be busy with 之后的动词需不需要加ing?

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bebusywith之后的动词需不需要加ing?bebusywith之后的动词需不需要加ing?bebusywith之后的动词需不需要加ing?要,bebusywithdoingsth.因为with是

be busy with 之后的动词需不需要加ing?
be busy with 之后的动词需不需要加ing?

be busy with 之后的动词需不需要加ing?
要,be busy with doing sth.
因为with是介词,所以带宾语,宾语用名词形式.

be busy with doing 忙于做某事

当然,介词后都要

be busy with sth/doing sth固定词组 ,意为忙于做某事.

be已经是一个动词了,后面当然要ing

be busy with通常来讲,后面加名词的情况比较多。
因为加动词可以直接说be busy doing
He is busy doing his homework.
=He is busy with his homework.
我们通常不讲:He is busy with doing his homework.