1,表时间的介词：at,before,after,since,still,until,upon,on,from,between,by,in,during,for,through,

within,over

2,表地点的：at,form,between,near,besid,by,close to,next to,behind,in front of,

ahead of,before,arong,beyond,past

3,表工具或媒介：by the means of,with,through

4,表内容：over,of,as for,with ,due to

6,表原因：for,because of,as a result of,owing to,on acconut of,due to