The little girl pretended___when her mother came into her room.为什么空格处是to be sleeping,而不是to having been sleeping.

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The little girl pretended___when her mother came into her room.为什么空格处是to be sleeping,而不是to having been sleeping.
The little girl pretended___when her mother came into her room.
为什么空格处是to be sleeping,而不是to having been sleeping.

The little girl pretended___when her mother came into her room.为什么空格处是to be sleeping,而不是to having been sleeping.
pretend to do呀,不是to doing

to have been sleeping含有完成的意思,而本句中只是说她母亲进来的时候,是一个过去正在进行的事件,所以用to be sleeping

pretend 后面跟的是to do sth.
所以to后要加动词原形be。
而having是动名词,是不对的。
记住pretend to do sth的固定结构就行了。