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

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 couldn't是过去式吗 can't的过去式 can't的过去式 couldn't与can't的区别! can't与couldn't的区别 could I .?疑问句的否定回答是哪一个?A couldn't B mustn't C can't couldn't 是can't的过去词吗?是不是呢? I couldn't hear you clearly.这里的could是can的过去式吗?还是作助动词,表示允许、许可]能,可以?I couldn't hear you clearly.这里的could只是can能的过去式吗?还是作助动词,表示允许、许可]能,可以?还是[用 can’t / couldn’t have 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 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 Tom () his homework yesterday,because he was in hospital all day.A.can't finish B.couldn't finish C.couldn't have finished D.mustn't finish选哪一个呢?我也选的C，但是是感觉。 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? can作为情态动词时没有过去式?情态动词不是没有过去式的吗那could和might又是什么啊China _____send people to space before ,but now.凭语感的话 肯定是couldn‘t,但想了一下,情态动词没有过去式,就填can’ 英语过去式 can't can't和couldn't区别? couldn't 同义句为什么要变过去式用适当的动词和情态动词填空 They couldn't find any secrets.=They ( )not( )to find any secrets.was able问：1.为什么不是were,able2.能否是are ,able？抑或因为could 是can 的过去式