1．can, could, may, might, must (包含其否定形式)
①Helen may/might go on a trip with us, but she isn't quite sure.
②[浙江高考改编]It was so noisy that we couldn't hear ourselves speak.
③If you must go, at least wait until the storm is over.
④May you have a long and fruitful marriage!
⑤Could/Can you please tell what time it is?
⑥—Is Mike coming to this party?
—He should but he can't,_because he has a lot of work to do tonight.
⑦You mustn't touch other people's head in this country as it will, according to local people, bring bad luck to both.
⑧—Is John coming by bus?
—He should, but he may_not/might_not. He likes riding his bike.
⑨—Isn't that your teacher over there?
—No，it can't be him. I'm sure he doesn't wear glasses.
⑩[2019·江苏扬州期末]The World Wide Web is sometimes jokingly called the World Wide Wait because it can be very slow.
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