You should all be helping each other to improve.这句中help为何要加ing,谢谢

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You should all be helping each other to improve.这句中help为何要加ing,谢谢

You should all be helping each other to improve.这句中help为何要加ing,谢谢
You should all be helping each other to improve.这句中help为何要加ing,谢谢

You should all be helping each other to improve.这句中help为何要加ing,谢谢
因为前面有“be”,所以后面的help要加上ing
You should all be helping each other to improve.和
You should all help each other to improve.语法上都对,前面一句的语气更重一些.

be 动词后加现在分词或现在分词或不定式。这里“你们要相互帮助”是主动进行,用现在分词helping