Present Tenses

A. am is correct because "am" is the only form of "to be" that pairs with the first-person singular pronoun "I" (e.g., "I am happy").

• B. is pairs with third-person singular ("he/she/it is"), not "I"
• C. are pairs with second-person ("you are") or plural subjects ("they are"), not "I"
• D. be is the base/infinitive form used after modals like "can," "will," or "must," not with "I" alone

A. is ✓

"Book" is singular, so it needs the singular verb "is." (If there were multiple books, you'd use "are.")

B. are — Wrong because "book" is one thing, not plural.

C. be — Wrong because "be" is the base form of the verb; you need the conjugated form "is" for present tense with a singular noun.

D. have — Wrong because this sentence needs the verb "to be" (showing existence), not "to have" (showing possession).

A. cannot ✓
This is the correct negative form of the modal verb "can." "Cannot" (or "can't") directly negates ability or permission.

B. has not ✗
This is the wrong auxiliary verb—"has not" is used with perfect tenses (like "has eaten"), not with modal verbs.

C. do not ✗
While "do not" works for regular verbs ("I do not drink"), it doesn't work with modal verbs like "can." You don't say "I do not can."

D. will not ✗
This negates future tense, not present ability. It changes the meaning entirely—"will not" means you refuse to, while "cannot" means you're unable to.

A. have ✓

• Use have with "I" in present tense: "I have a cat."
• Has is only for third person (he, she, it): "He has a cat."
• Had is past tense, not present: "I had a cat."
• Having is a gerund/participle form, not the main verb: "Having a cat is fun."

A. eats ✓

• "Usually" signals a habitual action in present time, so you need the simple present tense.
• "Eats" is the correct third-person singular form (she/he/it eats).

Why the others are wrong:
- B. ate – past tense; doesn't match "usually" (which describes her current habits)
- C. eating – this is a gerund/participle, not a conjugated verb; the sentence structure needs a main verb
- D. to eat – infinitive form; doesn't work as the main verb in this sentence structure

A. is washing ✓

The present progressive needs two parts: a form of "to be" + the -ing form of the verb. For "she," the correct form of "to be" is "is," so "is washing" is correct.

Why the others are wrong:
- B. washing — Missing the "is"; this is just the -ing form alone, not a complete verb phrase.
- C. does wash — This is simple present tense (used for habits or facts), not present progressive.
- D. wash — This is base form; it doesn't show the action is happening right now.

A. am seeing ✓

The present progressive describes an action happening now or planned for the near future. It needs TWO parts: the correct form of "to be" (am/is/are) + the -ing form of the verb. "Am seeing" combines "am" (correct for "I") with "seeing" (verb + -ing), making it grammatically correct.

Why the others don't work:
- B. see – Simple present tense; doesn't show the action is in progress
- C. seeing – Missing the "am"; you need the helping verb "to be"
- D. am see – Wrong verb form; "see" needs the -ing ending to go with "am"

Why A is correct:
With "for seven years," you need present perfect continuous (have been + -ing) to show an action that started in the past and continues now. "Have been learning" emphasizes the ongoing process.

Why the others are wrong:
- B (have): "Have learning" is grammatically incorrect; you need a past participle, not a base verb.
- C (has): Wrong subject; "I" takes "have," not "has" (which is for he/she/it).
- D (having): Creates "I having learning"—not a proper verb form for this sentence.

A. ever been ✓

The present perfect uses have + past participle. "Been" is the past participle of "be," so "Have you ever been to the USA?" is correct.

Why the others don't work:
- B. been ever – Wrong word order; "ever" must come before the past participle in present perfect questions
- C. ever – Incomplete; you need the past participle "been" after "have"
- D. ever go – "Go" is simple past, not past participle; present perfect requires "been," not "go"

Correct answer: A. have already

The present perfect uses "have/has + past participle" (have done). You need both "have" and "done" together to form the correct tense. "Already" is an adverb that can go between them.

Why the others are wrong:
- B (already have): Wrong word order—"already" shouldn't come before "have" in present perfect.
- C (already did): This is simple past, not present perfect. Use this for completed actions at a specific time in the past, not for recent actions still connected to now.
- D (did already): Also simple past with awkward word order; doesn't form present perfect.

A. yet ✓

In questions with "Have you...?" (present perfect), yet is the standard word to ask if something has happened up to now. It naturally fits: "Have you drunk your tea yet?"

B. so far – While grammatically possible, it's more commonly used in statements ("I've drunk three cups so far"), not questions.

C. far – Incorrect; "far" alone doesn't work here. You need "so" before it.

D. already yet – Wrong; these two words contradict each other and can't be used together. "Already" means it happened, "yet" suggests it might not have.

A. am ✓
"Am" is the correct present tense form of "to be" when the subject is "I." This is an irregular verb, so you just have to memorize this pairing.

B. are ✗
"Are" is used with "you," "we," and "they"—not "I."

C. is ✗
"Is" is used with "he," "she," and "it"—not "I."

D. be ✗
"Be" is the base/infinitive form (like "to be"). It's not conjugated for any specific subject in the present tense.

A. are ✓

"You are" is correct because "are" is the present tense form of "to be" used with the pronoun "you" (both singular and plural).

Why the others are wrong:
- B. am – Used only with "I" (I am)
- C. is – Used with third person singular like "he/she/it is"
- D. be – This is the base/infinitive form, not a conjugated present tense (e.g., "to be")

A. is ✓
"He" is third person singular, so it uses "is" (he is, she is, it is).

Why the others are wrong:
- B. am – only for "I" (I am)
- C. are – for "you," "we," and "they" (you are, we are, they are)
- D. be – this is the base/infinitive form, not conjugated for any specific person

A. is ✓
"She" is a third-person singular pronoun, and "is" is the correct present tense form for third-person singular (he, she, it).

Why the others are wrong:
- B. am — Used only with "I"
- C. are — Used with "you," "we," and "they"
- D. be — This is the base/infinitive form, not conjugated for present tense

A. is ✓

When the subject is "it" (singular, third person), you use is. Think of it like this: "It is a cat" or "It is raining."

Why the others are wrong:
- am – only for "I" (I am)
- are – for "you," "we," or "they" (you are, we are, they are)
- be – the base form, not conjugated for any specific subject in present tense

A. are ✓
"We" is a plural pronoun, so it uses the plural form of "to be," which is "are" (We are happy).

B. am — This is only for "I" (I am), not "we."

C. is — This is for singular pronouns like "he," "she," "it" (She is happy), not plural "we."

D. be — This is the base/infinitive form (to be), not the conjugated present tense form.

A. are ✓
"They" is a plural pronoun, so it uses the plural form of "to be," which is "are" (e.g., "They are happy").

Why the others are wrong:
- B. am – Used only with "I" (singular)
- C. is – Used with singular pronouns like "he," "she," "it"
- D. be – This is the base/infinitive form, not the conjugated present tense form

A. are ✓

"Books" is plural, so it needs the plural form of "to be." "Are" is the correct plural present tense verb.

Why the others are wrong:
- B. am – Only used with "I" (singular)
- C. is – Only used with singular nouns like "there is a book"
- D. be – The base form; can't be used alone in present tense statements

Why A is correct:
"Has" is the third-person singular present tense of "have." Since "she" is singular, you need "has" (not "have").

Why the others are wrong:
- B (is): Wrong verb entirely—"is" doesn't show possession. You need "have/has," not "be."
- C (have): This is plural/first-person form. "She" requires "has," not "have."
- D (haven't): This is negative and contracted. The sentence needs positive present tense, not negation.

A. haven't ✓
- This is correct because "I" is a first-person singular pronoun, which pairs with "haven't" (have not). The sentence needs present perfect tense to show something hasn't happened up to now.

B. hasn't ✗
- "Hasn't" (has not) is only used with third-person singular subjects like "he," "she," or "it"—not "I."

C. had ✗
- "Had" is past perfect tense, which describes something that happened before another past event. This doesn't fit the meaning of the sentence.

D. has ✗
- "Has" is third-person singular (for "he/she/it"), not first-person like "I."

A. have ✓

• "Have" is correct because the subject "I" is first person singular, which pairs with "have" (not "has").
• B. haven't - This is negative and changes the meaning to "I don't have blue eyes," which isn't what the sentence structure calls for.
• C. hasn't - This is third person singular (he/she/it), but "I" is first person.
• D. has - This is also third person singular; use "has" with he/she/it, not with "I."

Correct answer: doesn't
- "Our house" is a singular noun (one thing), so it needs a singular verb form.
- "Doesn't" (does not) is the singular negative form that matches "house."

Why the others are wrong:
- Don't: This is the plural form used with "I, you, we, they"—not with singular subjects like "house."
- Do: This is positive, but the sentence needs negative (we can tell from context it should say the house doesn't have five bedrooms).
- Shan't: This means "shall not" and is too formal/archaic for modern English; it also doesn't fit the meaning here.

A. Present Simple ✓

The Present Simple describes actions that happen regularly or repeatedly—like "I eat breakfast every morning" or "She goes to the gym on Mondays." It's the natural tense for habits and routines that are part of your regular life.

Why the others are wrong:
- B. Present Progressive describes actions happening *right now* ("I am eating"), not regular routines
- C. Present Perfect focuses on past actions with present results ("I have eaten"), not ongoing habits
- D. Past Simple talks about completed past events, not current routines

Why A is correct:
Present Progressive specifically describes actions happening right now, at this moment. It uses "is/are + -ing" (e.g., "I am studying").

Why the others are wrong:
- B (Present Simple): Describes habits or general truths, not actions currently happening (e.g., "I study" = regular activity)
- C (Present Perfect): Describes actions that started in the past and connect to now, but aren't necessarily happening *right now* (e.g., "I have studied")
- D (Past Simple): Describes completed actions in the past, not present (e.g., "I studied")

A. haven't eaten ✓

This is correct because "for a long time" indicates a period from the past continuing to now, which requires the present perfect tense ("have/haven't + past participle"). It means you stopped eating Japanese food at some point and still haven't eaten it.

B. hasn't eaten ✗ — Wrong subject-verb agreement; "hasn't" goes with third person (he/she/it), but "I" needs "haven't."

C. ate ✗ — Simple past tense suggests a completed action at a specific time in the past, not an ongoing state up to now.

D. eat ✗ — Present simple doesn't work with "for a long time"; it would mean a general habit, not a continuous absence.

Why A is correct:
"Have lived" is the present perfect tense, which shows an action that started in the past (2001) and continues to now. The phrase "since 2001" is a key signal to use present perfect.

Why the others are wrong:
- B (live): Simple present tense doesn't work with "since" — it only describes habitual actions, not ongoing situations that started in the past.
- C (lives): This is simple present with wrong subject-verb agreement (used with "he/she/it," not "I").
- D (has lived): "Has" is for third-person singular subjects (he/she/it), but "I" needs "have."

Why A (never) is correct:
"Never" means "at no time," so "I have never flown before" means you haven't flown at any point in your life—which makes perfect sense.

Why the others don't work:
- B (ever) – This would give "I have ever flown before," which is grammatically incomplete and awkward. "Ever" needs a negative or question context ("Have you ever flown?").
- C (always) – This means "at all times," which contradicts the idea of not having flown before.
- D (already) – This means something has happened before now, suggesting you *have* flown, not that you haven't.

Already (A) is correct because it means "by now" or "before this moment"—perfectly fitting the sentence to show completed homework.

Why the others don't work:
- Ever means "at any time" and is used in questions/negatives ("Have you ever done it?"), not positive statements
- Never means "not once" and contradicts the sentence (you'd be saying you *haven't* done it)
- Yet means "up to now" but is mainly used in negatives/questions ("Haven't you done it yet?"), not positive statements like this one

Correct answer: A (yet)
- "Yet" is used in questions and negatives to ask if something has happened up to now. "Have you drunk your tea yet?" is the natural way to ask if someone has finished their tea.

Why the others are wrong:
- B (most): "Most" is an adjective/adverb for quantity or comparison; it doesn't fit here ("Have you drunk your tea most?" makes no sense).
- C (ever): "Ever" asks about any time in life ("Have you ever drunk tea?"), not about a specific cup right now.
- D (never): "Never" is a negative statement, not a question word; you wouldn't ask "Have you drunk your tea never?"