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问题: 英语改错~~~

who do you think to help them finish the work on time last Thursday?

请改正并说明原因。

解答:

do you think 是插入语,拿掉后句子变成who(do you think )to help them finish the work on time last Thursday?
who to help ...没有谓语.而(do you think )已经倒装了,句子可以成述语序的
且last Thursday是过去时 用helped
who do you think helped them finish the work on time last Thursday?