为什么是what have you done而不是what had you done语法解释下

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• 两道2012辽宁高考英语单选题,求答疑33.Jack is a great talker.It's high time that he_______ something instead of just talking..It's high time that 啥意思?A.will do B.has done C do Ddid（答案D,我选A）35.Mum,I was wondering if you could lend me a few dollars until I __________ on Friday.A.get paid B.got paid C have paid D had been paid（答案是A,我选B）get ,have 搭配词组有啥区别?最好每个选项都能解释下~
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• 为什么是what have you done而不是what had you done语法解释下
• 美丽英文里有几句话翻译得很奇怪Life is a test.It is only a test.Had this been a real life you wuold bave been instructed where to go and what to do. Whenever I think of this humorous bit of wisdom,it reminds me not to take my kife so seriously.翻译：生活是一场测试,只是一场测试.假如懂得把现实生活当成一场测试,你早就知道自己的方向和目标了.每当这条富有幽默感的至理名言浮现在脑海中是,它便会提醒我要严肃的对待生命.Had this been real life you would have been...是肯定句还是什么句,为什么把had拉到前面,请懂的人把这句话讲解一下,然后最后一句是它提醒我要严肃对待生命,可又为什么有not.
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