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请问英语过去式的语法Why couldn't he decide

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请问英语过去式的语法Why couldn't he decide
这句话是一般过去式,decide为什么不用过去式decided谢谢
“这句话是一般过去式,decide为什么不用过去式decided” 因为句子中有情态动词 could ,因为情态动词后必须用动词原形,could 是can的过去式,所以本句的时态已经在 could上体现出来了.
请问英语过去式的语法Why couldn't he decide 英语,题目用所给的单词适当形式填空．1 I couldn't understand why he was so_____ why not,why didn't,why couldn't的区别 He couldn’t decide which restaurant.A.to have lonch B.to eat she couldn't decide which restaurant decide的过去式是什么? decide的过去式是什么 couldn't是can't的过去式吗 请问英语中couldn't wouldn't needn't mustn't的区别与用法? couldn't是过去式吗 动词bear的用法——Why did Bob cry?—He couldn't bear_______ fun of l couldn't后面是不可以加动词过去式?这是什么语法?