had better, should, ought to学习四要素(一)
had better,should,ought to 均为提建议型情态动词,常用来劝告别人去做某事,没有人称和数的变化,学习时应注意下列几点:
一、掌握基本用法
had better,should,ought to 含义及语气有所不同,请看下表:
二 、掌握创新用法
should 可表竟然,强调惊讶的情绪。
I cant imagine this problem should be so easy.
我想像不出这个问题竟然这么容易。
had better 也可改为 had best ,其意义和用法不变。
Im busy now,so you had best go there alone.
我现在很忙,所以你最好单独去那儿。
三、掌握句型变换方法
had better,should,ought to 均属于助动词,其疑问句、否定句及反意疑问句的构成均在自身形式上做变化。
1. 变成否定句方法
had better do 否定式为 had better not do,should do 否定式为 should not do 或 shouldnt do,ought to do 否定式为 ought not to do 或 oughtnt to do .
2. 变成一般疑问句方法
had better,should,ought to 构成一般疑问句时应分别将 had,should,ought 提到句首,其肯定与否定回答为 had / hadnt,should / shouldnt,ought / oughtnt .
【高中英语语法-had better, should, ought to学习四要素(一)】相关文章:
最新
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29