① 有些动词在汉语中是不及物动词,在英语中是及物动词,可能多一个介词。如:serve for the people, follow after him, play with her in a match, marry with her, engage withher
② 有些动词可作及物动词,也可作不及物动词,但搭配不同,可能混淆而多一个介词。如:join in the game, 但 join in the club; pay for a TV set, 但 pay for three dollars; search for the map, 但 search for the thief for his watch
③ 有些“动词 + 介词”形式的动词后面没有宾语时,后面的介词是多余的。如:He looked at but could see nothing.How are you getting on with?
④ 有些动词、名词、形容词后接名词或代词时须加一个介词,但接that从句时,必须去掉介词。如:agree to it, 但 agree to that...; be sure of it, 但be sure of that…; be sorry for it, 但 be sorry for that…
⑤ 有些副词或介词词组后加一个介词,组成了复合介词,若后面没有接宾语时,最后的介词则是多余的。如:If you won’t go, I’ll go insteadof.He walked out of.
⑥ 有些连词后加 of 成为复合介词,如果后接从句,of 是多余的。如:Because of he was ill…
⑦ 地点副词的意义中已经包含了介词 to,如果再用 to则是多余的。如:on my way to there, get to home, go to upstairs, return to home
⑧ last year, next month, this week, one day等名词词组直接充当时间状语,前面用介词是多余的。
⑨ 有些动词受汉语意思影响而多一副词,如:stop down(停下来), raise up (举起来), return back(归来,回来), repeat again (复述)
⑩ 有些动词在一种用法中要加副词,而在另一种用法中加副词则是多余的。如:build up our country, 但 build up railways