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)
4.shall/will/would
情态动词 意义
例句
备注
shall
表示征询意见。
Shall I help you?
用于第一、第三人称疑问句中。
表示说话人的意愿,有“命令,允诺,警告,决心”等意思。
①You shall do as I say. (命令)
②You shall have the book tomorrow. (允诺)
③If you don't get out, I shall knock you down. (警告) 用于第二、第三人称。
4.shall/will/would情态动词 意义
例句
备注
will/would 表示意愿
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