助動詞問題（1〜25）

No.	問題	選択肢	答えと解説
1	You ___ take an umbrella. It might rain.	A. should B. must C. can D. would	解答と解説答え：A. should 助言・忠告には "should" を使う。
2	She ___ be at home. I saw her car outside.	A. should B. can C. must D. would	解答と解説答え：C. must 強い確信・推量には "must"。
3	___ I open the window?	A. Must B. Shall C. Would D. May	解答と解説答え：D. May 許可を求める丁寧な表現。
4	He ___ speak three languages.	A. can B. must C. may D. shall	解答と解説答え：A. can 能力を表す助動詞。
5	You ___ be tired. You've been working all day.	A. must B. should C. may D. will	解答と解説答え：A. must 確信のある推量 → must。
6	He ___ have taken the wrong train.	A. should B. must C. can D. could	解答と解説答え：D. could 過去の可能性。
7	I ___ help you with your homework.	A. shall B. will C. might D. can	解答と解説答え：D. can 申し出の助動詞。
8	You ___ smoke in here. It's prohibited.	A. can B. must C. may D. must not	解答と解説答え：D. must not 禁止の助動詞。
9	If I were you, I ___ talk to him.	A. can B. would C. will D. shall	解答と解説答え：B. would 仮定法の助動詞。
10	He ___ come to the party, but he's not sure.	A. can B. will C. might D. must	解答と解説答え：C. might 不確実な未来の可能性。
11	You ___ leave now if you want.	A. may B. must C. should D. will	解答と解説答え：A. may 許可。
12	He ___ be at the meeting. I saw him there.	A. could B. must C. may D. should	解答と解説答え：B. must 証拠に基づく強い推量。
13	You ___ have told me earlier!	A. should B. might C. will D. shall	解答と解説答え：A. should 非難・後悔の助動詞。
14	She ___ be at the library. She often studies there.	A. must B. might C. will D. can	解答と解説答え：B. might 不確実な現在の推量。
15	You ___ be joking!	A. may B. must C. can D. should	解答と解説答え：C. can 驚きや否定的な推量の表現。
16	I ___ finish the report by tomorrow.	A. can B. may C. must D. shall	解答と解説答え：C. must 義務・必要性。
17	They ___ be here by now. Where are they?	A. should B. must C. can D. will	解答と解説答え：A. should 期待される行動。
18	You ___ park here. It’s for staff only.	A. can’t B. must C. won’t D. wouldn’t	解答と解説答え：A. can’t 許可されていないこと。
19	She ___ speak Italian when she was young.	A. can B. could C. might D. should	解答と解説答え：B. could 過去の能力。
20	We ___ go to the beach if it's sunny.	A. might B. must C. can D. should	解答と解説答え：A. might 未来の可能性。
21	You ___ try restarting your computer.	A. should B. will C. must D. may	解答と解説答え：A. should 助言。
22	I ___ call her now. She’s probably asleep.	A. must B. should C. shouldn’t D. can’t	解答と解説答え：C. shouldn’t 控えるべき行動の助言。
23	___ you like some coffee?	A. Shall B. Would C. Can D. May	解答と解説答え：B. Would 丁寧な申し出。
24	He ___ be home now; I just saw him leave.	A. must B. might C. can’t D. will	解答と解説答え：C. can’t 論理的にあり得ない。
25	You ___ be careful with that glass. It’s expensive.	A. would B. may C. must D. should	解答と解説答え：D. should 助言の表現。