in no time,right away, right now, at once 有何差别,细讲

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in no time,right away, right now, at once 有何差别,细讲

at once,in no time,right now,right away
这四个短语常可互换,只是说话角度上有细微区别.
1.at once等于now,without delay.如:
Do it at once.立刻就做.Come here at once!马上就来!
at once 也有“at the same time,together”的意思.如:
Don’t all speak at once!不要全体同时说话!
注意:all at once=suddenly
2)in no time
very quickly;very soon很快地;不久
With a pair of scissors,she can turn out a beautiful design in no time.用一把剪刀,她可以立即剪出一个美丽的花样来.
Take this medicine,and it will cure you in no time.吃了这种药,你的病马上就会好的.
They finished the work in no time at all.他们立刻完成了这项工作.
3.right now指at this moment,right away指毫不犹豫或毫不耽误的“立即”.如:
If you get the address,let me know right away.你看到地址,请立即告诉我.
Shall we begin right now?我们现在就开始吗?
(4)
at once 1.立刻,马上;同时;是一个副词短语

right now指at this moment, right away指毫不犹豫或毫不耽误的“立即”。
in no time 没有否定之意,它表示:立即.一般放在句末.
at once 立刻,马上;同时,一起