急：为什么What do you think is the most helpful invention?和what d

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急：为什么What do you think is the most helpful invention?和what do you think I can do?语序不同
What do you think is the most helpful invention 和what do you think I can do?都有插入语do you think ,为什么句子都算对,语序却不同?有没有插入语到底会不会影响语序?请真正的高手作答,

What do you think is the most helpful invention?这里是插入语,插入语不影响句子的成分结构.
what do you think I can do?这里特殊疑问词和what和 do you think组成混合疑问句,不是插入语,所以句子要用正常语序.
再问：那做题时又怎么区分do you think到底是插入语还是组成混合疑问句呢，依靠什么作为选择依据呢
再答：既然做插入语不会影响句子那就把do you think 去掉如果句子语序正常不受影响那就是插入语，如果受影响，则是疑问
再问：这样的话，如果把what do you think I can do?改为what do you think can I do? 句子也应该是对的把，改后的句子中 do you think 就是插入语了。What do you think is the most helpful invention？也可以改为混合疑问句What do you think the most helpful invention is？可以吗？为什么不可以？

急：为什么What do you think is the most helpful invention?和what d what do you think is the most helpful invention.为什么不是What do What do you think is the most helpful invention,do you think what do you think the most helpful invention is?可不可以把这个理解为一个初三的几道英语习题1.What do you think is the most helpful invention?2 What do you think is the most useful invention?这句中do you thi what do you think is the most useful invention in the world 连词成句 What do useful you think invention is the fourth most most,you,is,the,inveresting,think.invention,do,what(连词成句） Do you think what invention is the most useful 这句话对吗 what do you think is the ___(annoy) invention? 1.Invention What do you think were the most important invent