ow, ask, tell 等词后作宾语补足语的不定式常省略。再如:
Don’t touch the light unless your mother allows you to.
Don’t plant potatoes until the peasant tells you to.
(3)He didn’t want to hand in his composition, but he had to.
在be able to, be going to, have to, need to, enough to, used to等后的不定式需省略。再如:
I don’t sing much, now, but I used to a lot.
If you don’t want to say anything at the meeting, you don’t need to.
She didn’t go out last night, because she was afraid to.
在afraid, glad, happy, pleased, sorry等词后作状语的不定式常省略。再如:—Will you go with me to see the film tonight?
—I’ll be glad to
高三英语有关学问点3
1、 at
如: 常用词组有: at noon, at night
表示时间的 at, in, on:表示片刻的时间,at 8 o’clock,at midnight, at the end of, at that time, at the beginning of, at the age of, at Christmas, at New Year 等。
in 表示一段的时间
如:in the morning, in the afternoon, in the evening, in October, in 11018, in summer, in the past, in the future 等。
on 总是跟日子有关,on Monday, on Christmas morning, on the following, on May Day, on a warm morning 等。
2、表示时间的 since 和 from:since 表示从过去到现在的一段时间的过程,常与现在完成时连用:from 表示从时间的某一点起先,不涉及与现在的关系。一般多与现在时、过去时、将来时连用。
如:I hope to do morning exercises from today./ We have not seen each other since 11015.
3、表示时间的 in 和 after:两者都表示“在(某个时间)之后,区分在于in表示“在(一段时间)之后” ,而 after 则表示“在(某一详细时间点之后),in 短语和将来时态连用,after 短语和过去时态或将来时态连用。
如:We’ll be back in three days.
After seven the rain began to fall.
What shall we do after graduation?
After two months he returned. 留意:after 有时也可以表示在一段时间之后(常用在过去时里)
4、表示地理位置的 in, on, to:in 表示在某范围内,on 指与什么毗邻,to 指在某环境范围之外
如:Changchun is in the northeast of China./ Mongolia is on the north of Chin
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