couldn't 是can't的过去词吗?是不是呢?

couldn't 是can't的过去词吗?是不是呢? couldn't是can't的过去式吗couldn't的原型是can't吗?0 - 离问题结束还有 14 天 23 小时 couldn't的原型是can't吗?couldn't是过去式吗 As she was very weak,she couldn't move这里的couldn't与can‘t区别,couldn't表示过去时? couldn't与can't的区别! can't与couldn't的区别 can’t / couldn’t have 情态动词can't have done 和couldn't have done 有什么区别吗对过去发生的事情否定猜测用can't have done 或couldn't have done ,两者有区别吗?比如 He can’t have gone to Beijing for I saw him a minute ago. 能换成He couldn He said he couldn't follow me.句中couldn't能换成can't吗?He said he couldn't follow me.他说他跟不上我表示过去的能力时只能用can的过去式could吗?我查了资料又说了许多表示过去能力不用could的情况,感觉好 cannot can't couldn't mustn't的问题1.cannot = mustn't 是不准?那can't呢?2.can是不能够,may是不可能 对不?3.cannot can't couldn't之间的不同 英语翻译那时我情不自禁的尖叫了一声,所有的人都看着我,他们肯定以为我疯了.请问这个是过去时态，i can't help需要变成i couldn't help吗？ couldn't是过去式吗 用can、can't、could、couldn't写一篇关于自己的短文 不少于60词 can't与couldn't 的用法I can't give you anythingI couldn't give you anything那句是对的啊 这两句意思有不同吗? Her daughter is so young that_ go to school这题填couldn't 吗? 如果是为什么用过去是不是can not? can't和couldn't区别? could I .?疑问句的否定回答是哪一个?A couldn't B mustn't C can't 写一篇文章是关于你自己,使用can ,can't,could ,couldn't答得好的加分 couldn't be 是表示肯定的意思吗?