Past Tenses

Why A is correct:
"Was" is the past tense form of "to be" used with "I." Last night is in the past, so you need a past tense verb.

Why the others are wrong:
- B (am): Present tense only; doesn't match "last night"
- C (is): Used with "he/she/it," not "I"
- D (were): Past tense, but only used with "you/we/they," not "I"

Were is correct because:
- The sentence describes a past situation that ended ("until my dad had to move"), so you need the past tense.
- "We" is a plural pronoun, so it pairs with the plural past tense verb "were."

Why the others are wrong:
- Are – present tense, but the sentence is about the past
- Is – used with singular subjects (he, she, it), not "we"
- Am – used only with "I," not "we"

A. had is correct because it's the past perfect tense. You need "had left" to show that people left *before* you arrived—two past events where one happened first.

• B. has is present perfect, which doesn't fit the past context ("when I arrived")
• C. have is also present perfect and doesn't match the past tense needed
• D. was is simple past, but "was left" changes the meaning (it sounds like people were abandoned, not that they departed)

Why D (was) is wrong: "Was" is simple past tense, but the sentence needs perfect aspect (showing duration or completion before another past event). Without context of another past event, this sounds incomplete.

Why B (has been) is wrong: "Has been" is present perfect, but it doesn't fit here—you'd use this if the action is still ongoing or just finished.

Why C (will) is wrong: This is future tense, which doesn't make sense with "playing" in this structure.

Why A (had been) is correct: "Had been" is past perfect, showing an action that happened over time in the past and was completed before another past event. This is the proper tense for expressing duration in past situations.

Why A is correct:
"Used to" is the correct phrase for talking about something you did regularly in the past but don't do now. The sentence means you had a dog at some point before.

Why the others are wrong:
- B (use): Present tense—this would mean you have a dog now, not in the past
- C (using): This is a gerund/present participle; it doesn't fit the grammar of "to have"
- D (uses): Third person singular (he/she/it)—doesn't match with "I"

A. was ✓

• The sentence describes a past situation: she didn't sleep enough (past), so she felt tired (past). Use simple past tense "was."

B. has been ✗
- "Has been" suggests the tiredness continues into the present, but the sentence shows a completed past event with a clear reason (didn't have enough sleep).

C. have been ✗
- Wrong subject-verb agreement; "have" doesn't match the singular subject "she."

D. will be ✗
- "Will be" is future tense, but the lack of sleep already happened in the past.

Why A is correct:
Maria is asking about the past (she "didn't know"), so you need past tense. "Was" is the correct past tense form for "he/she."

Why the others are wrong:
- B (is): Present tense doesn't fit—Maria already didn't know, so this happened in the past
- C (am): This is only used with "I," not "her father"
- D (were): This is past tense but only for "you," "we," or "they," not "he/she"

Why A is correct:
"Was" is the past tense singular form of "to be." The sentence describes something that happened last night (past time), and "I" is singular, so "was" is the only correct form.

Why the others are wrong:
- B (am): Present tense—doesn't match "last night"
- C (is): Present tense singular for "he/she/it"—wrong tense and wrong person (not used with "I")
- D (were): Past tense plural or used with "you"—doesn't match "I"

Why A is correct:
The sentence needs a past tense verb to match "the party" (a completed event). "Enjoyed" is the correct past tense form.

Why the others are wrong:
- B (enjoys): This is third person singular present tense (he/she enjoys), but "we" is plural and the action is in the past
- C (enjoying): This is a gerund/participle form; it doesn't work as the main verb here without a helping verb like "were"
- D (enjoy): This is present tense, but the party already happened, so we need past tense

Why A is correct:
"Called" is simple past tense, which shows Mom's action happened at a specific moment while you were already cooking. This matches the setup perfectly—two past actions, one interrupting the other.

Why the others are wrong:
- B (had called): Past perfect suggests Mom called *before* you started cooking, not during it.
- C (was calling): This implies Mom was in the *middle* of calling for a while, which sounds awkward and unclear about when it happened.
- D (has been calling): Present perfect continuous doesn't fit—this happened in the past, not recently or ongoing now.

Correct Answer: A (wasn't)
- This is a simple past situation: you went to the park today and experienced it in that moment. "Wasn't" is the simple past negative, which matches the timeline perfectly.

Why the others are wrong:
- B & C (had not / had not been): These use past perfect, which is only needed when you're showing one past event happened *before* another past event. That's not the case here—there's just one past action.
- D (has not): This is present perfect, but your experience at the park is already finished. Simple past "wasn't" is more natural and correct.

Why A is correct:
"Was playing" is past continuous tense, which shows an action that was ongoing when another past event (the phone call) interrupted it. This matches the situation perfectly.

Why the others are wrong:
- B (have been playing): Present perfect continuous doesn't fit—it describes actions starting in the past and continuing to now, but the dinner call already happened in the past.
- C (played): Simple past suggests the action was finished before the call came, not interrupted by it.
- D (will play): Future tense doesn't work—this already happened in the past.

A. used ✓

• "Used to" is the correct structure for talking about past habits or states that no longer exist. Since the dog passed away (past event), you need the past tense form.
• B. use – Wrong tense; "use to" isn't grammatically correct (missing "d"), and doesn't show this is a finished past situation.
• C. uses – Present tense; contradicts the past time reference ("passed away").
• D. using – Gerund form; doesn't fit the sentence structure needed here.

A. had seen ✓

This sentence needs past perfect (had + seen) because it describes an action that happened *before* another past action. You realized (past) that you had seen Mary (earlier past). The word "before" signals this earlier timeframe.

Why the others are wrong:

• B. saw – Simple past, but doesn't show that seeing Mary happened *before* the realization
• C. has seen – Present perfect, but the whole sentence is in past tense ("realized")
• D. was seeing – Past continuous suggests an action in progress, not a completed action before realization

A. visited ✓

This is correct because "yesterday" signals a simple past action that is complete. You need the simple past tense (visited).

Why the others are wrong:
- B. was visiting — Past continuous describes an action in progress at a specific moment, not a completed action.
- C. had visited — Past perfect is used when one past action happened before another past action; there's no earlier past event here.
- D. had been visiting — Past perfect continuous shows a prolonged action before another past event; again, no earlier past action is mentioned.

Correct answer: A. had been waiting

This sentence needs a past perfect continuous tense because the waiting started *before* the train arrived and continued *up until* that moment. "Had been waiting for two hours" shows an ongoing action in the past that led up to another past event.

Why the others are wrong:
- B. had waited – Past perfect, but doesn't show the action was *continuous/ongoing* for the full two hours
- C. waiting – Not a complete verb form; needs an auxiliary verb like "was" or "had been"
- D. was waiting – Simple past continuous, but doesn't establish that this action happened *before* the train arrival; it just describes a past moment

Correct answer: A. was jogging
- Uses past continuous tense, which shows an action in progress when another past action interrupted it ("ran into" interrupted your jogging)
- This is the natural way to describe two overlapping past events

Why the others are wrong:
- B. jogged – Simple past suggests the jogging was completed; doesn't show it was interrupted
- C. had jogged – Past perfect suggests you finished jogging before meeting your friend, not that you were jogging when you met them
- D. had been jogging – Past perfect continuous is over-complicated here; it's used for actions with longer duration or specific emphasis, not simple interrupted actions

Correct: A. swam
- "Swam" is the simple past tense of "swim," which is what you need here (the action happened "last week").
- The subject "I" uses the past tense form without a helping verb.

Why the others are wrong:
- B. swum – This is the past participle; it only works with helping verbs like "have" ("I have swum"), not alone.
- C. swimmed – "Swim" is an irregular verb, so it doesn't follow the regular "-ed" pattern; this isn't a real form.
- D. has swum – This is present perfect tense ("has" = present), but your sentence is about the past, not something continuing to now.

Why A is correct:
The sentence describes two past events where one happened *before* the other—you found the wallet first, then decided to turn it in later. "Had found" (past perfect) shows this earlier action, making the timeline clear.

Why the others are wrong:

• B (find): Present tense doesn't fit a completed past event.
• C (had been found): Passive voice ("was found by someone") doesn't match the meaning—*you* found it, not the other way around.
• D (finded): Not a real word; "found" is the correct past tense of "find."

Correct Answer: A. lied
- This sentence describes a completed action in the past ("yesterday"), so you need the simple past tense: "lied" (past tense of "lie," meaning to recline).

Why the others are wrong:
- B. lying — This is a present participle; it can't stand alone as the main verb in a complete sentence.
- C. had lied — Past perfect is used when one past event happened *before* another past event. Here, there's only one action, so simple past is correct.
- D. had been lying — Past perfect continuous describes an ongoing action that ended before another past moment. We don't need that complexity for a single completed action.