DO more exercise and breathe more fresh air,which is beneficial to us.这句话对吗?如果把逗号去掉连成一句话要怎么改?

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DO more exercise and breathe more fresh air,which is beneficial to us.这句话对吗?如果把逗号去掉连成一句话要怎么改?
DO more exercise and breathe more fresh air,which is beneficial to us.这句话对吗?
如果把逗号去掉连成一句话要怎么改?

DO more exercise and breathe more fresh air,which is beneficial to us.这句话对吗?如果把逗号去掉连成一句话要怎么改?
不对
DOing more exercise and breathing more fresh air are beneficial to us.
楼上的:由and连接的两个(或多个)动名词或不定式做主语,如果并列的动名词或不定式语义相同或相似,谓语用 单数;如果语义不一致,则谓语用复数.所以我认为你的那个用it不合适.

it's beneficial to us to do more exercise and breathe more fresh air.