He is beginning to understand that he did wrong tohis sister.这句话可以把is beginning 改成begins吗?为什么?

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He is beginning to understand that he did wrong tohis sister.这句话可以把is beginning 改成begins吗?为什么?

意思不同,is beginning强调了现在他正在开始理解这一过程,非常形象,最好不换.