介词后跟名词,动名词.如：
Let's go for a walk along the river.咱们到江边散散步.
He's good at drawing.他善长绘画.
及物动词后要跟宾语.如：
We study English every day.
不及物动词后不跟宾语如果需要跟宾语的话,要借助介词(不及物动词+介词+宾语).如：
The children are listening the music.