① I can see you on Monday.
② You can pay by credit card. (cash)
③ We both can swim.
④ I can’t believe it.
⑤ Can I ~? Could I ~? May I ~?
――Sure. / OK. / I’m sorry, but you can’t.
⑥ Can you ~? Could you ~? Will you ~? Would you ~?
――Sure. / I’m sorry, but I can’t.
⑦ I will be fifteen next month.
⑧ I will take(have) this one.
I will let you know. （let me know：知らせる）
⑨ I will get my jacket. （get：取ってくる）
She will be back in ten minutes. （in：～後）
⑩ It will rain tomorrow.
⑪ I am going to go to Tokyo on Sunday.
⑫ She must do her homework.
She must be busy.
⑬ I don’t have to do my homework today.
You mustn’t touch these paintings.
⑭ May I come in?
May I try this on? （try on：試着する）
⑮ I may call you tonight. （may：50%）
It might rain tomorrow. （might：30～40%）
⑯ Shall I carry your bag?
――Yes, please. / No, thank you.
⑰ Shall we have lunch now?
――Yes, let’s. / No, let’s not.
⑱ You should call him. （should：すべきだよ）
She should call you later. （should：はずだよ）（later：後で）
⑲ You should find a new job.
Everything should be OK. （すべてうまくいくはずです）
⑳ She used to go to the movies almost every week.
㉑ I used to live in Kyoto.
She used to have long hair.