某些情态动词的特殊用法:
need 和dare 的两种形式的用法
need 和dare可以用做实义动词,后面接不定式(to do)结构,在疑问句和否定句中,加助动词do/does/did/或dont/doesnt/didnt。作为情态动词使用时,主要用于疑问句和否定句中。情态动词neednt(没有必要,不必)相当于dont have to
例句:
1. It is cold, you need to wear some warm clothes.
2. Need I stay here with you for a while ? Thank you, you neednt.
3. How dare you speak to parents like that ?
注意:
句型I dare say+从句。 意思是:我肯定 = Im sure或There is no doubt that+从句。
例句:
I dare say that my uncle will get the money if I die.
will和would
表示意志或愿意,would 则指过去愿意做
例句:
1. He said that he would help us.
2. You may telephone if you will accept this job.
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