新概念英语第二册 第65课词组
(2013-02-24 21:28:43) 转载▼
分类: 新概念英语第2册辅导
本课重点:情态动词Must,Have to,Should and ought to
一、词组 decide to 决定 take?to 带到?去 比较:bring?from 从?带来 be dressed up 打扮起来 dressed up as 扮成
Father Christmas = Santa Claus 圣诞老人 guard of honour = honor guard 仪仗队 set off 出发
this sort of thing 这类事 agree to 同意
get?off 叫??走,离开 be amused 感到有趣 let?off 把??从宽发范 main street 大街 a side street 小路 hold up 阻碍,防碍(交通) refuse to 拒绝,不愿
have a difficult time 伤透脑筋 have a good record —贯表现很好 this time 这次
should have (ought to have) ? 早就该 do you have to? 有必要 you don’t have to 不必
过去式had to代替 must (在过去式中用)
As they didn’t understand,I ________ explain everything again. agree to这个to有时是介词,有时是不定式
He agreed to get someone to help us. (to是不定式) I don’t agree to this. (to是介词) 二、【Key structures 】关键句型 must ,have to , should , ought to
must:必须做某事,通常表示说话人的主观意愿
have to:必须做某事,不得不的含义,通常指句子主语从客观上讲不得不做的含义 should:应该做,强调义务与责任
ought to:应该做,强调义务与责任,但是ought to 比 should 语气更强烈些 1. should have done, ought to have done 应该做(发生),实际上没做(发生) eg. I must leave now. 主观上,我必须走了
I have to leave now. 客观上,我不得不走了
I missed the train, so I had to take a taxi. 我没乘上火车,所以我不得不乘出租车(客观上) 。 前面过去式,所以后面也是过去式
当表过去某时不得不做了某事,只能用had to,不能用must 因为must表必须,表达是对将来行为一种要求和命令,无法表达过去的行为。
eg. She had to go shopping yesterday. 她昨天不得不去买东西
eg. I should do some work tonight, but I think I shall go to the cinema instead. 我今晚本该做功课,但我认为我应该去看电影 should表应做某事,强调义务和责任。
eg. I’m sorry I’m late, I should have taken a taxi. / I’m sorry I’m late, I ought to have taken a taxi. 对不起我迟到
了,我本该打车来的。 should have done/ ought to have done 表示本应该做某事
2. should/ ought to 也可表示“可能”
eg. John should be at home. / John ought to be at home. John可能在家 John should be working, / John ought to be working. John 可能在工作
John should have left now. / John ought to have left now. John 现在可能已经走了
3.情态动词表示说话人对某种可能性感到的肯定或不肯定的程度,可以按照从最不肯定might到最肯定must列出来。 最为肯定的是:must
eg. You might be right. 你或许对了。(表示非常不肯定 没有把握) eg. You may be right. 你可能对了。
eg. You must be right. 你一定对了。( 一种对判断的肯定