it is high time that后的句子如果是Be动词,是不是一定要用were?

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• it is high time that后的句子如果是Be动词,是不是一定要用were?
• Given more time and money,they would have done it better.如果给他们更多的时间和金钱,他们就会做德更好这里面好象是省略的一个条件状语从句,如果补充完整是 1.if they were given ...还是2.if they had been given...两个都可以还是只有其中一个正确啊?如果是1,if可以一起省略吗?这种情况只能省略主语和be动词啊如果是2,那就是一个虚拟语气,能这样省略吗?但我还是不大明白，这里given more time and money究竟是不是由状语从句省略了而来的,为什么能够省略成只剩下given...那if和句子的主谓呢?能全省了吗?
• Have you decided what you want to do after school?want 是不是要改成wantedHave you decided what you want to do after school?中decided后句子是不是宾语从句,如果是,主句的动词decieded是过去分词,后面的从句是不是也要用过去时态,want 是不是要改成wanted?宾语从句中,主句用过去时态,从句也要用相应的过去时态,这里的过去分词decided是不是也是按过去时态的用法加从句?
• it is high time that后的句子如果是Be动词,是不是一定要用were?如：it is high time that such practices were ended.我看到一本参考书说不论从句人称,一律用were,是这样么?
• i found ____ hard to finish the work in such a short time?I found ____ hard to finish the work in such a short time.这题的四个选项中有两个选项分别为it’s和it,我觉得选it,不过老师说find后面也可以加be动词,如果it‘s是错误的,是不是因为is没有用过去式呢?那这个句子算不算宾语从句呢?如果是,那么主句和从句的时态可以不一致… …不知道我有没有想错,那么i found 后的be动词是不是要用过去式呢?希望大家帮忙梳理梳理,
• 读书笔记与读后感的不同
• ()()do you have dinner?At 6 o'clock.