用所给的单词的正确形式填空 1.Look!The boys( )[swim]in the river. doing?

如题所述

1.Look!The boys (are swimming) in the river.
解释:因为从“look"可以看出,这里是现在进行时,又因为”boys(男孩)"是复数,因此要用“be swimming"的”be"要用“are".
翻译:看!男孩们正在河里游泳。
补充:be包括(is,am,are,was,were)
其中,were为are的过去式,was为(am,is)的过去式。
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第1个回答  2012-01-29
are swimming
第2个回答  2012-01-29
is swimming
第3个回答  2012-01-29
look! the boys are swimming in the river doing?
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