by now 在句中要用是什么时态

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by now 在句中要用是什么时态
by now 在句中要用是什么时态

by now 在句中要用是什么时态
看情况而定.
常用完成时.也可以用一般时,过去时,将来完成时.
Her secret remains untold by now.
How many people have accessed your homepage by now
By now the power of the Roman Empire was on the wane.
By now,a rocket will have set off on its35 million mile trip to Mars and scientists must be waiting anxiously for the results.

完成时

by now 在句中要用是什么时态英语：by now是什么时态? 句中有now是什么时态句中有now是什么时态句末有by now用什么时态 by now 一般与什么时态连用? now体现出是什么时态 He was now 是什么时态英语时态的疑问!However,this opinion is now being questioned by more and more city residents,这句话是什么时态? by now的意思?有by now时,句子用什么时态? just now 是什么时态的标志? just now是什么时态的时间状语 You look tired now是什么时态? now lived 是什么时态的词 you've done it now是什么时态 just now 用在什么时态 by the end是什么时态的标志句中有by是什么时态?...was written by sb.