I couldn’t help but （） that it was a mistake to let him go alone.A) think B) thought C) to think D) thinking为什么答案选A?不是说but前面有do不加to,前面没do要加to吗?

分类: 作业答案 • 2022-07-27 00:22:12

问题描述：

I couldn’t help but （） that it was a mistake to let him go alone.
A) think B) thought C) to think D) thinking
为什么答案选A?不是说but前面有do不加to,前面没do要加to吗?

答

不用，因为could 是情态动词，后接动词原形，故A对

答

can't help but do sth. 只能做某事（固定搭配，与but等连接不定式遵循有do无to原则无关）

答

意思是 ,除了认为让他一人单独走是个错误外,我什么也帮不了.
can't help but do 除了之外什么也做不了
can't help doing 情不自禁做