children seem to be reading less than they do before.to be +doing是什么用法

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children seem to be reading less than they do before.to be +doing是什么用法
children seem to be reading less than they do before.to be +doing是什么用法

children seem to be reading less than they do before.to be +doing是什么用法
这句话不是这么划分的.关键词为seem ,其结构为seem (to be)+adj/n/v+ing.

现在进行时,此处应表示现在一段时间的情况