1）简单介词：about,across,after,against,among,around,at,before,behind,below,beside,but,by,down,during,for,from,in,of,on,over,near,round,since,to,under,up,with等等。
2）合成介词：inside,into,outside,throughout,upon,without,within
3）短语介词：accordingto,alongwith,apartfrom,becauseof,infrontof,inspiteof,insteadof,owingto,upto,withreguardto
4）分词介词：considering,reguarding,including,concerning
