時制問題（476〜500）

No.	問題	選択肢	答えと解説
476	They ___ their homework yet.	A. didn’t finish B. haven’t finished C. don’t finish D. hadn’t finished	解答と解説答え：B. haven’t finished 「yet」付きの否定 → 現在完了。
477	She ___ to the store when it started to rain.	A. walked B. walks C. is walking D. was walking	解答と解説答え：D. was walking 雨が降り出したときに進行中 → 過去進行形。
478	By 2026, they ___ the new library.	A. will build B. have built C. will have built D. built	解答と解説答え：C. will have built 未来の時点までに完了 → 未来完了。
479	I ___ him since he moved away.	A. haven’t seen B. didn’t see C. don’t see D. hadn’t seen	解答と解説答え：A. haven’t seen 現在完了（今も見ていない）。
480	He ___ already eaten before I got home.	A. has B. had C. was D. did	解答と解説答え：B. had 〜より前に完了 → 過去完了。
481	She ___ to school every day.	A. goes B. go C. went D. is going	解答と解説答え：A. goes 習慣的行動 → 現在形。
482	They ___ a movie last night.	A. watch B. watched C. have watched D. are watching	解答と解説答え：B. watched 「last night」→ 過去形。
483	I ___ my homework yet.	A. didn’t finish B. haven’t finished C. don’t finish D. hadn’t finished	解答と解説答え：B. haven’t finished 「yet」あり → 現在完了否定。
484	We ___ our grandparents last weekend.	A. visited B. visit C. have visited D. had visited	解答と解説答え：A. visited 明確な過去の出来事 → 過去形。
485	She ___ a letter at the moment.	A. writes B. has written C. is writing D. wrote	解答と解説答え：C. is writing 今まさに行っている → 現在進行形。
486	He ___ to school before the bell rang.	A. had gone B. goes C. went D. has gone	解答と解説答え：A. had gone 〜より前にすでに → 過去完了。
487	I ___ very tired lately.	A. felt B. feel C. have felt D. had felt	解答と解説答え：C. have felt 最近ずっと → 現在完了。
488	They ___ TV when the power went out.	A. watch B. watched C. were watching D. had watched	解答と解説答え：C. were watching 途中で電気が切れる → 過去進行形。
489	She ___ lunch when I saw her.	A. eats B. ate C. was eating D. had eaten	解答と解説答え：C. was eating そのとき行動中 → 過去進行形。
490	We ___ to the zoo tomorrow.	A. went B. go C. will go D. have gone	解答と解説答え：C. will go 未来の予定 → 未来形。
491	They ___ the news yet.	A. haven’t heard B. didn’t hear C. don’t hear D. hadn’t heard	解答と解説答え：A. haven’t heard yet付き → 現在完了の否定。
492	I ___ her since last month.	A. haven’t seen B. didn’t see C. hadn’t seen D. don’t see	解答と解説答え：A. haven’t seen since ～ → 現在完了の継続。
493	By the time we arrived, the movie ___.	A. starts B. started C. had started D. has started	解答と解説答え：C. had started 着いた時点ですでに → 過去完了。
494	He ___ in the company for five years before he quit.	A. works B. worked C. had worked D. has worked	解答と解説答え：C. had worked 辞める前までの継続 → 過去完了。
495	We ___ dinner now.	A. have B. are having C. had D. were having	解答と解説答え：B. are having 現在進行 → 現在進行形。
496	She ___ to New York twice.	A. goes B. has gone C. has been D. went	解答と解説答え：C. has been 経験 → 現在完了。
497	I ___ this movie before.	A. saw B. have seen C. see D. had seen	解答と解説答え：B. have seen 経験 → 現在完了。
498	They ___ already left when we got there.	A. have B. had C. were D. are	解答と解説答え：B. had 〜の時にはすでに → 過去完了。
499	He ___ his job last week.	A. quits B. has quit C. had quit D. quit	解答と解説答え：D. quit 過去の明示 → 過去形。
500	By tomorrow, I ___ everything.	A. will have done B. did C. do D. have done	解答と解説答え：A. will have done 未来完了形 → 明日までに終える。