there be +名词 + doing
动词的ing形式修饰前面的名词.
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there are already robots working in factories.
there are already robots working in factories.
already后面不是接done吗?这句里为什么用doing?
already后面不是接done吗?这句里为什么用doing?
英语人气：712 ℃时间：2020-03-25 04:28:43
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