1 go , goes , went , going
2 have , had
3 is, is , was
4 singing , sings, sang , sang
5 does, do , does , is doing , Did do
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祝天天开心，学习进步！本题不明白，请再问；
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2 have , had
3 is, is , was
4 singing , sings, sang , sang
5 does, do , does , is doing , Did do
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祝天天开心，学习进步！本题不明白，请再问；
如果对你有所帮助，请点击本页面中的“选为满意回答”按钮,谢谢！
*****************************************************************************追问
第六题捏
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