to be doing 怎么理解

例: The child doesn't appear to be learning quickly.

1。不定式不应该表示还没发生的事情吗？为什么和进行时态的be learning搭配呢？

2。如果这个句子否定 not to be learning 而不是 doesn't appear ，意思一样吗？

The child doesn't appear to be learning quickly.

这个句子是由下面句子转换而来：

It doesn't appear that the child is learning quickly.

that从句的主语改为主句的主语，从句的谓语改为不定式结构，就得到了网友的句子。

句义为：从表象上看不出这个孩子学的快。

It appears that the child isn't learning quickly.

从表象上看，这个孩子学的不快。

改为提升主语结构：

The child appears not to be learning quickly.

曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 1秒前

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