immediately/ instantly/ presently/ directly/ shortly/ soon/ at once/ right away
这些副词或副词词组均有“立刻，马上”之意。
immediately 指做完一件事后，立即就做另一件事，中间一般没有明显的时间间隔。
instantly 指恰恰就在此刻，一秒钟也没耽误。
presently 指不久、即将。
directly和immediately同义，指毫无迟疑。
shortly和soon同义，指动作发生或完成的速度之快。
soon 常用词，指行动快，完成速度快。
at once 口语中常用，语气强烈，指时间紧迫，一刻也不能耽误。
right away 主要用于美国英语，语气稍弱于at once，强调动作迅速。
He is a harsh man, at once pompous and officious.
他是个严酷的人，既自负又爱管闲事。
The film is at once humorous and moving.
这部电影既幽默又动人。
All at once pandemonium broke out again and it was impossible to hear what anybody was saying.
纷乱的嚷闹起来了，谁也听不清谁的话语。
Go and fetch the doctor at once.
马上去请医生。
※Better deny at once than promise long. 轻诺必寡信。
※He that doth most at once doth least. 想一次做完什么事，结果一件也做不完。
※He that once deceived is never suspected. 一次行诈骗，永远遇疑嫌。
※No man can do two things at once. 心无二用。
※No man ever became thoroughly bad at once. 没有一个人是一下子就坏透的。
※One cannot be in two place at once.
※The heart that once truly loves never forgets. 真正的爱情是永不会忘记的。
※Who undertakes many things at once, seldom does anything well. 许多事情同时干，一件事也办不成。
