at the moment , for the moment , for a moment 和 in a moment 之区别。

at the moment 的意思是“现在”“此刻”，常与一般现在时或现在完成时连用。例如：I have got enough to do at the moment.
但是，at the moment 有时也作“当时”讲，用于过去时态。例如：
I didn't buy that book, because I had no money on me at the moment.

2. for the moment意为“暂时”。如:
　　She is out, so you may use her typewriter for the moment.
她出去了,你可以暂时使用她的打字机。

3. in a moment 意为“立刻”。如:
　　I'll join you in the discussion in a moment.
我一会儿和你们一起讨论。

4. for a moment意为“一会儿”。如:
　　I had to think for a moment before I remembered his name.
我想了一会儿才记起他的名字。

at the moment “此时”、“此刻” ( 现在时态 ) “那时” ( 过去时态 )
for the moment “目前”、“暂时”。for a moment 一下子，片刻，一会儿。表段时间
in a moment 很快，立刻，稍等片刻，马上。做时间状语