I haven't had time to relax 这是什么时态吗?为什么要用这个时态?

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• in,for的区别（仅限表示时间）我看了别的关于这个的问题,但觉得表述的不是很确切,有些笼统.今天翻历史书发现有一句谚语Rome wasn't built in a day.为什么这里的in不是for呢“也可以表示过去的时间内，就像June的JUNE 提到De`“in the past time”，这个是in的独特用法，一般句式只用in 而不能够用for。像：I haven't had a wink of sleep in three days.我已经三天没有合眼了。”这是粘别的回答的、、他说是in的独特用法啊但是他说 “ I haven't had a wink of sleep in three days.我已经三天没有合眼了。”但后来又看到他写的 “for的用法也没有in那么多限制。I haven't seen you for a long time/短语表过去时间”两种不是一样吗、、那为什么又一个用for一个用in呢
• I haven't had time to relax 这是什么时态吗?为什么要用这个时态?
• 1.I don't know the man who____a blue hat.is wearing.这个地方为什么要用正在进行时啊?如果是wears 2.She is very happy.Lucy tells me.(改成间接引语）答案是Lucy tells me she is very happy.这个是不是答案错了呢?我觉得两个动词都应该改为过去式才对吧.3.像这种句子是不是填过去式和现在式都可以呢?比如说Candy ___ ____ ___in our shop.（我们店里也买糖果）答案是用的是过去时态,如果用现在时态可以吗?有三个问题,都是一些细节,
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• 语法I think I passed in English .为什么要用过去时?1、I think I passed in English .为什么要用过去时?为什么不用现在时(我想不是现在的想法吗):I think I pass in English.或者为什么不用将来时：I think I will pass in English.2、I hope I haven't failed./I'm sure I've got a low mark.这两句的时态是过去时还是完成时?请说明为什么要用这种时态
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