you should be careful.为什么要加be而不直接是you should careful.

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• 几道英语题,小一休进来1What a funny time to eat breakfast!time是不可数的,为何要加a?2I'm sorry ( )in your new school.A.that you are not happy yet.B,if you are not happy yet.答案是B,为何不选A?3Where is Jack?Sorry,I don't know.Go and ask his brother,he ( )know.A,canB,mayC,should,D,can't答案是B,我觉得C也对,为什么不选C?C错了吗?
• 两个英语句子的语法问题1.who was the first one to arrive?我想reach后面不用跟介词而arrive要,所以填了reach.请问这里为什么要用arrive呢?这个arrive在这些类型的句子里有特殊用法吗?还是句子本身错了?2.not only （should you ）help him with his math but you should help him with his english.这本来是一道选择题,选择部分是括号里面的内容,我一开始选了you should,但答案是这个.请问是答案错了还是有特殊用法?
• You should say "Thank you"when someone passes you the salt on the table,when someone walking beforeyou keep the door open for you,when someone says you have done your work well,you have bought a nice thing,or your city is very beautiful.（1~2）1.为什么when someone says 中用says而不用saying,况且上文也有when someone walking before you keep the door open for you（难道是句中的before 可是都是介词后的动词加ing呀）2.为什么when someone walking before you keep the door open for you中要用keep而不用keeping
• you should be careful.为什么要加be而不直接是you should careful.
• I can't agree with you 和I can't say I share your view的区别原题是这样的：----The whole performance is a failure.---- __________.At least Rose deserves our praise.A.It's not worth watching.B.I should give up my plan.C.I can't say I share your view.D.I can't agree with you.基本上根据题意可以排除A、B两项,问题是C、D两项是不是都可以用?或者哪一个更好一点?他们之间有什么根本区别吗?但是为什么不选D呢？我需要理由，而不仅仅是答案。
• We can't work out the physics problem.Can you tell us----------?A.how to do B.waht to do it C.how to do itD.what should to do 为什么不选A,看讲解是what可做do的宾语.how不可做do的宾语,因此需加代词it.（但是看不懂啊,为什么what可以而how就不行.为什么不行又必须加it）
• 请教原形动词be的用法?如You can be here.这里为什么要加be,而不直接用You can here.
• you should be careful.为什么要加be而不直接是you should careful.
• I'd rather you __there next week.A.went B.go C.should go D.had gone哪个选项正确,为什么?我需要的是解释，而不是直接报答案。
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• Plants use energy from sunshine to make their food.这句话中的energy怎么翻译?
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