现在完成时的一些问题Did you see my book 与 Have you seen book 意思上有什么区别,还有单项选择里怎样才能知道他强调的是过去还是现在 （没有关键词）have you seen my book i can not find it.请问这句话强

现在完成时的一些问题Did you see my book 与 Have you seen book 意思上有什么区别,还有单项选择里怎样才能知道他强调的是过去还是现在 （没有关键词）have you seen my book i can not find it.请问这句话强 DID YOU FINISH YOUR HOMEWORK.改为现在完成时 Hao long did you swim?(改成现在完成时) 对于现在完成时的提问的一些问题先举个例子：when _ you _ this book?I _ it for two weeks A、have；bought ；have had B、did ；buy ；have had 我知道答案是A,但我后来冒出了一个疑问 如果选B,语法上也没有错 III．请根据下面问题的答案,整理出一篇游记.你还可以增加一些问题.1.Where did you go?2.When did you go there?3.How did you go there?4.What did you do there?5.How did you like there?6.Was it beautiful?Was it fun?Did you have a 关于时态的问题、一般过去时和现在完成时--The iPhone 4S has benn on the market for some time.Have you got one? --Yes,I bought one during my visit to HK.为什么buy用的是过去时呢?不是用完成时来提问的吗?--Have you se Did you have a party yesterday?(改现在完成时） did you send the letter?改为现在完成时怎么改 A:I have finished my homework B:when did you finish it上面A的用现在完成时,为什么下面B用一般过去式呢?而不是现在完成时呢? 关于现在完成时的一些问题.现在完成时变一般疑问句和否定句的结构.现在完成时变一般疑问句,句中的already照抄吗?像这样：I have already seen that film.是不是变成Have you already seen that film?变疑问 用现在完成时写一篇关于个人信息的英语作文问题如下.What's your name What kind of job do you want?How long have you been studying English Have you ever visited an English-Speaking country?When?Why did you study English What's the Have you had a good weather last weekend?有的人说这句话是错误的 要把have 改成 did 我想请问一下 为什么不能用have 我感觉用have 现在完成时提问没有什么问题 到底用have 错在哪里 为什么非用did 有关现在完成时表否定的问题 几个关于被动语态的初中问题1.The policeman found the shopkeeper (had been killed) and a lot of things (had been stolen).为什么括号内填的的过去完成时而不是现在完成时?-------2.-Did you do all you could (helped) those w 英语现在完成时的用法,thank you when后面是不是不能用现在完成时啊?还有助动词后面的动词要原型比如一般疑问句When did you buy this book? When did you see it?I saw it in September,2001.回答的句子为什么不用现在完成时,表示从九月初到九月末? did you ever see such a 那为什么这句话不用现在完成时呢?