Ken couldn't go to the movies because he ___look after his b

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Ken couldn't go to the movies because he ___look after his brother.
A.had to B.has to
但是答案却是B啊

这里其实应该用现在时态,has to
因为从句意理解,Ken因为必须照看弟弟而不能去电影院了
就是一个正常的陈述语气,没有任何过去式的成分
但是你的疑问可能是在couldn't上,这里couldn't不是can not的过去式,这里用couldn't是语气上的委婉表达,中文意思翻译就是说“Ken应该是去不了了,因为他要照顾弟弟”,用can't的话太强硬,就变成了“Ken不能去看电影,因为他要照顾弟弟!”
我在美国的时候经常听美国人把I couldn't放在嘴边而不说I can't,因为这样显得自己语气不是很强硬
比如说我让你帮我看家~你有事不能帮我,你应该说“I couldn't because."（意思是其实我很想帮忙但是由于我真的有事所以不行）如果你用I can't 意思就是我不能帮你,太强硬了
在欧美的书信中也经常见到I couldn't,所以你要注意,不要一看到I could't 就联想到一般过去式哦!

Ken couldn't go to the movies because he ___look after his b Bob thought he couldn't go to the party because he had too m He couldn't go to the Swimming Club because he was ill 同义句 the boy was so excited that he couldn't go to sleep after he He can't to go to the movies with us He(didn’t)(go to school)because(of)his(ill).A B C D he couldn't go to work because he was ill同义句英语改错1.He （didn't） go to （the） meeting (because) his (illnes he couldn't move his legs,because his legs (hurt) After calling his mother,the reason why he didn't go to scho He likes going to the movies with his father.与He likes to go 英语几道 help!he couldn't ___ because of his broken lega rise b