作业帮关于反义疑问句的几个问题1.What he told us is very interesting,___?A.isn't it B.isn't they C.can't they D.is itA（主语是he为什么选A?）2.To do morning exercises has helped improve our health,___?A.hasn't it B.has it C.doesn't it D.
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关于反义疑问句的几个问题1.What he told us is very interesting,___?A.isn't it B.isn't they C.can't they D.is itA（主语是he为什么选A?）2.To do morning exercises has helped improve our health,___?A.hasn't it B.has it C.doesn't it D.
关于反义疑问句的几个问题
1.What he told us is very interesting,___?
A.isn't it B.isn't they C.can't they D.is it
A（主语是he为什么选A?）
2.To do morning exercises has helped improve our health,___?
A.hasn't it B.has it C.doesn't it D.does it
A（have表拥有时,既可以用have也可以用do,那为什么不选C?）
关于反义疑问句的几个问题1.What he told us is very interesting,___?A.isn't it B.isn't they C.can't they D.is itA（主语是he为什么选A?）2.To do morning exercises has helped improve our health,___?A.hasn't it B.has it C.doesn't it D.
第一题的回答：这句话的主语其实是主语从句what he told us,你说的he其实是主语从句里的主语,而不是这句话的主语.而这个主语从句是一件事,所以要用it来代替.
第二题的回答：这里的has不是你以为的“拥有”这个含义,准确的说,这里的has根本没有实际含义,因为他是现在完成时的助动词.你的问题出在分不清have/has什么时候表示拥有,什么时候是现在完成时的助动词,这里告诉你,其实很简单,如果表示拥有,那have/has后面必定会有名词,如果have/has后面是动词过去分词的话,那就是现在完成时了.
第一题的主语实际上并不是he，而是what he told us即他告诉我们的（事情），因此用it。
第二题的have并不是表示拥有，have与helped合在一起构成现在完成时态，即have为助动词，因此答案选A
1. 这个句子中的主语不是he ,而是What he told us 是主语从句，所以用it 代替。
2. 这个句子中的have不是有的意思，这里是助动词， has helped 构成现在完成时态。
eg . he has finished his homework , hasn't he ?