介词+sb后面+to do 还是doing?如after sb()

问题描述:

介词+sb后面+to do 还是doing?如after sb()

AFTER SB 后不接TO DO 也不接DOING,应该根据句意用相应的时态,因为TO DO /DOING 不能作谓语,如
He will go to play football after he finishes his homework .
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