一、兩者的側重點不同。right away比較側重於動作例：He didn"t answer right away.譯：他沒有馬上回答right now比較側重於時間例：You should buy a house right now.譯：你該著手買棟房子了。

二、兩者的應用的時態不同。right away一般應用於過去或者將來時態。例:Now we must be off right away. 譯:現在我們必須馬上離開,.例:He didn"t answer right away.譯: 他沒有馬上回答。

三、兩者讀音不同。right away：英 [rait əˈwei] 美 [raɪt əˈwe]

right away用於將來馬上什麼什麼

right now用於現在正在什麼什麼

拓展資料：

right away：

She sussed out right away that there was something fishy going on. 她馬上就意識到這裡有可疑的事情在發生。It was very sharp of him to have noticed that detail right away. 他可真機警，一下子就注意到那個細節。 I have finished the manuscript and will post it out right away. 稿子已脫手，我馬上寄出。The mother wishes if only she could meet her son right away. 媽媽恨不得立刻見到兒子。I asked her to stay for dinner, but she insisted on leaving right away. 我請她留下來吃飯，她卻偏偏要走。

right now：

Our immune systems are killing billions of germs right now. 我們的免疫系統此刻正在殺滅億萬個細菌。 ‘I really am all right now,’ Isabel insisted. “我現在真的全好了,”伊莎貝爾堅持說。 We can go right now, ok, yah. 我們馬上就可以走,好的,是的。 I want to redo it, but I can’t spare the time right now. 我想重新做，但就是拿不出時間。I’m not in the mood to indulge in idle argument with you right now. 我這會兒煩著呢，沒工夫跟你閒磨牙。