介词和连接词的分别?

介词并不是连接句子的.介词后面是跟名词或者动名词的.
比如,in the sky, among them
连词后面才跟句子呢，比如，but, and
当然有些词又能作介词也能做连词的．比如for
We should study for ourselves. 介词
It must have rained, for it is wet on the ground.连词

既然有有这么长的我也不说什么了
就告诉你for,on,in,at是介词
and,or,but是连词

介词代表方位，例如：behing in front of
连词多以on and but为主
介词后面是名词