when后面是不是不能用现在完成时啊?还有助动词后面的动词要原型
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when后面是不是不能用现在完成时啊?还有助动词后面的动词要原型
比如一般疑问句When did you buy this book?
比如一般疑问句When did you buy this book?
![when后面是不是不能用现在完成时啊?还有助动词后面的动词要原型](/uploads/image/z/217700-44-0.jpg?t=when%E5%90%8E%E9%9D%A2%E6%98%AF%E4%B8%8D%E6%98%AF%E4%B8%8D%E8%83%BD%E7%94%A8%E7%8E%B0%E5%9C%A8%E5%AE%8C%E6%88%90%E6%97%B6%E5%95%8A%3F%E8%BF%98%E6%9C%89%E5%8A%A9%E5%8A%A8%E8%AF%8D%E5%90%8E%E9%9D%A2%E7%9A%84%E5%8A%A8%E8%AF%8D%E8%A6%81%E5%8E%9F%E5%9E%8B)
when后面不跟现在完成时,可以跟过去式,将来时,一般现在时.
这就对于,i have lived in shanghai for 10 years.对于for 10 years 划线部分提问,只用how long,不用when的道理.
助动词,不仅仅是do,does,did,还包括情态动词,在疑问句和否定句中,动词用原型.但是现在完成时中的助动词have,has,疑问句否定句动词不还原,还是过去分词.被动语气里,be动词提前,后面还是过去分词.
再问: 可以为我举几个耳熟能详的例子吗
再答: 陈述句:
he likes swimming,疑问句,does he like swimming? what does he like ?
分别对like 使用了原型
情态动词:
he can swim. can he swim? what can he swim?
现在完成时的助动词:
he has had lunch-------has he had lunch?
has 助动词提前,had 过去分词不还原
这就对于,i have lived in shanghai for 10 years.对于for 10 years 划线部分提问,只用how long,不用when的道理.
助动词,不仅仅是do,does,did,还包括情态动词,在疑问句和否定句中,动词用原型.但是现在完成时中的助动词have,has,疑问句否定句动词不还原,还是过去分词.被动语气里,be动词提前,后面还是过去分词.
再问: 可以为我举几个耳熟能详的例子吗
再答: 陈述句:
he likes swimming,疑问句,does he like swimming? what does he like ?
分别对like 使用了原型
情态动词:
he can swim. can he swim? what can he swim?
现在完成时的助动词:
he has had lunch-------has he had lunch?
has 助动词提前,had 过去分词不还原