-Might I watch TV after supper?
-Yes, you may. /No, you mustn't.
--晚饭后我可以看电视吗?
--可以。/不可以。
2.表示推测(多用于肯定句和否定句中)
She may not know about it.
她可能不知道这件事。
3.may放在句首表示祝愿。
May you succeed.
祝你成功。
4.may/might as well do ..."不妨做......;还是做......的好"。
If that is the case, you might as well try.
如果事情是这样的,你不妨一试。
三、must与have to
1.have to着重于外界的压力,有"不得已而为之"的意思;must则强调内在职责的影响,一般仅用于现在时和不久的将来时。
My sister is ill, so my mother has to look after her.
我妹妹病了,所以我妈妈不得不照顾她。
We must help each other.
我们必须互帮互助。
2.must表示必须,构成的反意疑问句,否定回答用needn't 或don't have to。
-Must I go now?
-Yes, you must./No, you needn't/don't have to.
--现在我必须走吗?
--是的,必须。/不,你没必要走。
3.must表示推测,只用于肯定句。
He must be at home now, because the light is on.
他一定在家,因为灯亮着。
4.must表示固执坚持(用于条件句或疑问句中)。
If you must smoke, go to the smoking area.
如果你一定要吸烟,到吸烟区去。
集中演练1
1-1.单句改错
①-Could I go now?
-Yes, you could.第二个could→can
②May it be true?May→Can
③Might that day come soon. Might→May
④-Must I answer all the questions?
-No, you mustn't.mustn't→needn't/don't have to
⑤You must work hard nowadays to make a living.must→have to
1-2.完成句子
⑥他有时会很粗心。
He can be very careless at times.
⑦--我已经72小时没睡觉了。
--你一定筋疲力尽了。
-I've had no sleep for 72 hours.
-You must be exhausted.
⑧他现在不可能在家。
He can't be at home now.
⑨你与其把钱花在赌博上,不如把它丢掉的好。
You might as well throw your money away as spend it in gambling.
⑩如果你非得做点什么的话,那就喝点茶吧。
If you must do something else, have some tea.