新概念英语第二册77-04
发布时间：2012-12-26 编辑：查字典英语网小编
agree to do : 同意做某事(to 为不定式 )
agree with sb
agree to (prep)sth
I agree with you. / I agree to your advice. / I agree to go with you.
off＝away from离开什么地方
must+v推测 ; have to: 不得不
afterwards＝later后来
it was fortunate that...
carry : 抬起来
should跟现在有关系
should have done跟过去有关系
let sb off(go) : 让某人走(离开)
record : (警察局的)记录
set up a new world record
sb have a good record
resume : 履历
(resume n.摘要, 概略, <美> 履历 vt.再继续, 重新开始, 重新占用, 再用, 恢复)
情态动词+have done一定和过去有关系
1、表示推测的过去 : must/can't/may
2、虚拟语气相连 : would have done
3、should have done : 原本该做但是没做
4、needn't have done : 原本不必做但是做了
【Key structures】关键句型
should(应该)/ought to(应该)/have to
ought to : 应该(强调义务)
have to : 不得不
must表示推测
should应该(含有建议)
Exercise C Supply the correct form of should, ought to, or have to in these sentences:
用should, ought to, 或have to填空 :
1 He______(come) at 4 o'clock if the plane arrives on time.
2 I didn't go shopping this morning as I_______(do)the housework.
3 She_______(come) to see me yesterday, but she forgot.
4 You_______(ask) for permission before you left the table.
5 As they didn't understand, I_______(explain) everything again.
1 should come 2 had to do : 不得不 3 should have come 4 ought to have asked
5 had to explain
【Special difficulties】难点
let sb off : 让某人走 / let sb down : 让某人失望 / let sb in/out : 让某人进来/出去
情态动词如果后面加动词原形,认为跟现在或将来有关,一旦要和过去有关,一定在情态动词后面加have done
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