Question

minami

教えてください！

仮定法過去完了は (旧+S+had +過去分調~, s'+ would Ccould/might/should]+ have 十過去分
調)という形で「もしSが~であったら, S は…であった[できた1だろう」 という意味。過去の事実に反
する内容を述べるときに用いる。
A次の(
)から適切な語句を選びなさい.
18. If I (have used / used/had used)a computer, I could have finished the work
SOOner.
19. If Ken (was not / had not been / has not been) ill, he could have won the game.
20. If you(come / have come / had come) earlier, you could have caught the bus.
21. If she had not had a toothache, she(can sing /could sing / could have sung)
better.
22. If I had brought a camera, I (would have taken / will take /would take) some
pictures.
23. If I had been born at that time, I (may be / might be / might have been) a rich
man.
24. If we had practiced harder, we (can win / could win / could have won) the game.
25. If I (have taken / took /had taken) an umbrella, I would not have got wet.
26. If he had left home five minutes earlier, he (will not miss / would miss / would
not have missed) the train.

Answer 1

taka

minamiさん、問題の冒頭に説明文があります。
つまり、「以下の問題は、説明文の内容を確認して解けば、正解になります。」と言っています。
再度読んでみてから、問題文を解いてみてください。
【ポイント】
仮定法[過去完了]：If＋S＋[動詞の過去完了]([had+～ed:動詞の過去分詞]), S＋[助動詞の過去(would/could/might/should)＋動詞の完了形(have+動詞の過去分詞)]

念のために、解答を書いておきます。
18. (had used)
19. (had not been)
20. (had come)
21. (could have sung)
22. (would have taken)
23. (might have been)
24. (could have won)
25. (had taken)
26. (would not have missed)

参考にしてください。