作业帮..and my hometown has become more and more beautiful.这是一句过去完成时,为什么become用原形?
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..and my hometown has become more and more beautiful.这是一句过去完成时,为什么become用原形?
..and my hometown has become more and more beautiful.这是一句过去完成时,为什么become用原形?
..and my hometown has become more and more beautiful.这是一句过去完成时,为什么become用原形?
这里的become是充当过去分词
become的原形和过去分词是一样的
这一句是现在完成时态的句子。谓语结构是：have /has +动词的过去分词。become的过去分词是become .所以这样写。
这句话不是过去完成时，而是现在完成时，因为用了has + 过去分词。如果过去完成时就应该用用had了。这里become不是用的动词原形，而是用的过去分词，因为become-became-become，和原形写法相同，所以比较特殊。
希望可以帮到你哦O(∩_∩)O哈！
这句话是现在完成时，因为是has+动词的过去分词
而become的过去分词和原型相同，所以这样写
祝你进步，有不会的可以再问我哦
这里的become要用过去分词。书上P140。
become的过去式是became，
而它的过去分词和原来一样，
还是become，
这里的become是过去分词而不是原型。
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