专题八 │ 正面解读 情态动词 意义
例句
备注
should
应该(常与oughtto通用) You should be polite to the old.
ought to 的否定式:ought not to(oughtn't to);疑问式:Ought …to…?
竟然
It is strange that he should react in this way.
表示惊讶、意外等语气。
万一
①Should anyone phone, tell them I will call back later. (= If anyone should phone…)②If I should go there tomorrow, I would go to see her.
用于if从句中强调“万一”,或用于虚拟语气。
3. need, dare
专题八 │ 正面解读 情态动词 例句
注意事项
need ①I needn't go at once.
②—Need you go at once?—Yes,I must. /No, I needn't. ①need可以作实义动词,用于各种句式。如:I need to go at once.I don't need to go at once. —Do you need to go at once?—Yes,I do.②need作情态动词常用于否定、疑问或条件句中。 dare ①He daren't cross the river.②How dare you say that to me? dare和need一样,既可以作情态动词,也可用作实义动词。用作情态动词时,主要用于否定句、疑问句和条件句。用作实义动词时,可用于各种句式。如:He didn't dare (to) go out alone at night. (在否定句中to有时可省略)
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