用before连接：He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态：I had made an appointment before I went see the dentist.

用before连接：He opend the window?He closed the door first?(before)这句话中前半部是什么时态后半部又是什么时态：I had made an appointment before I went see the dentist. He was very ill.He died.(before)用括号里的词连接句子 he didn't get to the airport .it was dark.用before 还是 when?请问 为什么? It wasn’t long before he learned English. The boy isn't short. He is _______than before. He doesn't wash his hands before meals是什么意思? Smoking is bad for him health.He doesn't give up smoking.（用though连接） -Why didn't you tell him the truth?-He rushed out with tears before I could say anything.这里为什么要用before呢 He's read this book before ,< A hasn't he B doesn't he C isn't he D wasn't he老师复印的卷 I don't know Tom's address.He doesn't know Tom's address,either.(用neither...nor连接) 对于情态动词加现在完成时表反问,如何判断有无过去时间标志?比如He may have killed someone,为什么反问用didn't he?还有He couldn't have been to the US before,为什么用has he ? 3道Has he closed the door No,he left the classroom with the door____.A.on B.open C.closed D.opend我选的是DDon't forget to_____the computer when you leave.I_______A.turn off;don't B.close;don'tC.close;won't D.turn off;won't我选的是BLook,that He is heavy now but he was thin before(用not...any more 改写句子)He _____ thin _____ _____now.Lily can't sing English songs He thinks(合并为一句)He _____think Lily____sing English. 选用括号内适当的连词连接句子1.Mr Smith came into the office.He told us the good news.(until/as soon as)2.His mother dosen't come before five.He will do the cooking.(if/as soon as)3.He had got a high temperature,but he was still going on He didn't like listening to music before,but now he like it 的同义句 He doesn`t b什么his teeth before he goes to bed He won't believe it before he sees it with his own eyes.(英译中) he mustn't eat as many cookies as he did before.怎么翻译?和...一样