一些英语单词解释right away、at once、 right now、in a minute 、at the mo

一些英语单词解释right away、at once、 right now、in a minute 、at the mo at the moment , at once,right now,right away区别 at once ,right now,right away和now的区别 是in a moment minute吗?能把in改为at吗?=at once right away吗 turn down\ not at all\ right away=right now=at once\ wait in at once right now right away at the moment 区别、比如用在哪个时态 我想知道right now ,right away ,at the moment 和 at once 他们四个的用法 right away=at once=right now? right away、right now 区别是、 in a minute=? at once,in a second,right away的不同 in no time,right away, right now, at once 有何差别,细讲 on the spots/at once/ right now/right away的区别