时间:2023-01-13 21:50
这是口语中常用的have的形式;构成have to结构;构成had better,had best,had rather等词组。
一、have的形式
二、have的基本用法
1、与过去分词构成各种完成时态。例如:
I’ve seen this movie.
我看过这部电影。
Kenny had not kept the door locked; there had been no need.
肯尼没有锁门,因为没有必要锁门。
2、与been+现在分词构成各种完成进行时态。例如:
I’ve been dancing all morning.
整个上午我都在跳舞。
Li Yan had been working for the Company for seven years。
李岩一直在这家公司上班,已经有七年了。
3、构成have got词组,这是口语中常用的have的形式。例如:
I have got two sisters.
我有两个姐姐。
4、构成have to结构。
1)have to与must意义相近,但must没有“时”的不同形式,have to有“时”的各种形式(had to,have / has / had had to),并能与一些助动词(shall / should,will / would, may / might等)连用。例如:
I have to / must leave now.
现在我一定得走了。
I didn’t catch the last bus last night, so I had to walk home.
昨夜我没赶上末班车,所以不得不走回家。
2)have to 的疑问式和否定式是do+主语+have to…?和do+not have to…。也可用 have +主语+ to…?和have not to的形式。例如:
Do you have to go now? 或 Have you to go now?
你现在一定得走吗?
Mike doesn’t have to be here.或 Mike hasn’t to be here.
麦克无须呆在这儿。
5、构成had better,had best等词组。
had better 和had best 是“最好还是……”或“还是……好”的意思。在had better中,had不表示过去时间,不能用have或has代替。had better后可接不带to 的不定式或接进行式、完成式或被动语态。例如:
You’d better not leave the dormitory.
你最好不要离开宿舍。
You had better hope Jim makes it back.
你最好祈祷吉姆能平安归来。