Yesterday I have come back from China.这句话里有Yesterday ,为什么还能用现在完成时呢?

I should have already arrived HK yesterday . I planned to have visited you yesterday. I should have listened to you yesterday.为什么加HAVE I ate all()sandwiches yesterday.Can I have one of() I have been to Today Bench(用yesterday改写句子) I( )( ) Today Bench yesterday ____he____(come)yesterday,I would have seen him. I ( )an English class yesterday填had、have、has哪一个? I have a swim every day ------ yesterday 介词 I have seen Sam and Tim yesterday.有什么错误? look! I have bought a digital camera yesterday.是否正确? I have seen a bus yesterday.的被动语态 I have to take one and com back a() If I (have)_your phone number,I would have called you yesterday evening I have a cold yesterday,what should.I do now ,what.should I eat,or drink I have been sick since yesterday.中have been 是什么是时态为什么要用been. I have my hair cut yesterday.这句话对吗?为什么是have而不是 had? 翻译:''I have a bad cold.I coughed a lot yesterday. I am not afraid of tomorrow for I have seen yesterday and love today.