英语句子中加have/has是一般完成时还是现在完成时?

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• I have a book .否定形式是?1.I have a book 的否定形式是:I have not a book .还是 I have no a book.2.have not这种否定形式,除了用在现在完成时,不是还可以用在一般现在时么?另外.我看到语法书上说有 have not .的用法啊..(在一般现在时态中)
• how long 短暂性动词 用法、How long did she leave 请问下.how long 现在完成时,不能跟短暂性动词leave,连用,改成 been away .那一般过去时,如果不行,还是要改成 How long did she be away 短暂性动词 在 一般过去时中,能够用在很多疑问句中,那如果是 how long 连用的 一般过去时疑问句,是否可以 抱歉，更正一个句子打错了。：How long did she be away 改成 How long was she away 呵呵。2 下面几个句子 语法上都正确 OK 其实还是请判断，短暂性是否可以再 过去时和完成时，与 how long 连用。呵呵How long was she away A How long has she been away?BHow long was she gone CHow long has she been gone?DHow long did she leave for?E
• 英语语法疑问It is high time +一般过去时,作为虚拟语气.那么,it was high time 后面用一般过去时还是过去完成时?It was the training that he had as a young man () made him such a good engineer.A hasB laterC thatD which我选B.因为这是强调句型,如果不强调：The training he had as a young man made him such a good engineer已经是一个完整的句子了,所以,不应该用连词that或which来引导.为什么?我忽然明白了，应该选C that这个C才是和前面的it was组成强调句型。前面的that引导的是定语从句。另外，我前面的那个问题：it was high time that 后面动词应该怎么用？用什么时态？
• 我知道been 是be的过去分词 可是一般来说现在完成时是 have/has+动词过去分词（I have lived here since 1998）这个lived我会用,可我在写作文的时候 从来都不知道现在完成时什么时候需要用到been
• 五、下列句子中有一般过去时和现在完成时.选出现在完成时的句子,并填上have或者has：
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• 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,语法上也没有错误,并且我曾经看到过这样一个句子：when did you finish your homework I have just finished my homework.那像这样的问句,什么时候问句里加完成时,什么时候加一般过去式呢
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• 五、下列句子中有一般过去时和现在完成时.选出现在完成时的句子,并填上have或者has：