请问英语过去式的语法Why couldn't he decide
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?