【简明语法】21.5 must表示推测
时间:2019-02-05 作者:英语课 分类:英文语法词汇
英语课
1) must用在肯定句中表示较有把握的推测,意为"一定"。
2) must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。
You have worked hard all day.You must be tired. 你辛苦干一整天,一定累了。(对现在情况的推测判断)
He must be working in his office. 他一定在办公室工作呢。
比较:
He must be staying there.
他现在肯定呆在那里。
He must stay there.
他必须呆在那。
3) must 表示对已发生的事情的推测时,must 要接完成式。
I didn't hear the phone. I must have been asleep 1. 我刚才没有听到电话,我想必是睡着了。
4) must表示对过去某时正发生的事情的推测,must 后面要接不定式的完成进行式。
---Why didn't you answer my phone call?
---Well, I must have been sleeping, so I didn't hear it.
5) 否定推测用can't。
If Tom didn't leave here until 2 five o'clock, he can't be home yet 3. 如果汤姆五点才离开这儿,他此时一定还未到家。
adj.睡熟了的,麻木的;adv.熟睡地
- The baby seems to be asleep.那婴孩好像是睡着了。
- My right foot is asleep.我的右脚麻木了。
prep.直到...为止;conj.直到...时才...
- He arrived home until midnight.他直到半夜才到家。
- She didn't sleep until midnight.她直到半夜才睡。