by\x20now用法 by now用于什么时态

by now的用法其实就是now在句中作时间状语,这一种.by now 读音:英 [baɪ naʊ] 美 [baɪ naʊ] 释义:到现在为止.用法:1、表示“到如今” 例句:What money I .

just now, 表示刚才,常用于一般过去时,just for now, 表示就现在而言,常用于现在时态.

by now一般用在现在完成时

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.

by now用于现在完成时.现在完成时表示动作发生在过去,但与现在的情况有联系,有时无时间状语,有时和一些表示不确定的过去时间状语连用,如:many times,just,yet,ever,never,already,before,so far, by now等连用.

这题选A: is winning 原句还原是:It must be clear to find out who is winning at the moment(by now) by now 可用于多种时态,要根据语境具体分析哦.提供例句供亲参考..

与现在完成进行时连用have/has been doing

by now 用现在完成时(present perfect tense) Tom should has been in the class by now.

到现在为止,现在完成时态 确定

就是再见的意思.你可以看看CCTV9的节目,主持人结束时一般都会说这个的