She is thinking about what to do next.中的to do 为何不用doing

问题描述:

She is thinking about what to do next.中的to do 为何不用doing
1个回答 分类:英语 2014-10-02

问题解答:

我来补答
to do表示将要做而没有做,根据句意,他要思考下一步该做什么
 
 
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