作业帮it is time to do等于it is time for doing?
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it is time to do等于it is time for doing?
it is time to do等于it is time for doing?
it is time to do等于it is time for doing?
没有区别
It is time to do sth.这种更常用.例如:It's time to go to bed.
It is time for doing 也有,但不如前者那么常用.例如:It's time for breakfast（eating breakfast）.
it is (high) time that... ...
It is high time we went home now.
== It is high time we should go home now.
It is time we started doing our work.
==It is time we should start doing our w...
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it is (high) time that... ...
It is high time we went home now.
== It is high time we should go home now.
It is time we started doing our work.
==It is time we should start doing our work.
It is time we left for the airport.
==It is time we should leave for the airport.
从意义上讲，这个句式没有任何were式虚拟的意味，但是最流行的用法是在其从句中使用一般过去时态。虽然这个句式有很多be式虚拟的意味，而且也可以使用should do的形式，但是远不如用过去时态的形式更为流行和普遍，建议最好使用一般过去时态的形式，少用should do的形式。
我建议，大家在理解和运用it is (high) time that...句式的时候不要把它理解成虚拟语气，只是把它当作一个特定的句式就可以了，这样掌握起来反而便利得多。建议的要点有二：
1、在 it is (high) time that...从句中尽量使用一般过去时态这种形式。
2、在 it is (high) time that...从句中如果使用了should do 的形式，要注意这个句式中的should 一般不省略。
二 it is time to do强调现在,不含虚拟的意味,例如:
It's time to go home,please be quick.
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一样的
如果你问的是表示"该做某事了”这个句型， 应该有两种： 1 It's time to do sth. 2 It's time for sth. 例如： “ 该吃晚饭了。 可以说 It's time to have lunch. 也可以表达成 It's time for lunch.