语法直通车

被动语态要点1.若宾语补足语是不带to的不定式,变为被动语态时,该不定式前要加“to”。此类动词为感官动词。(feel,hear,help,listento,lookat,make,observe,see,notice,watch)Theteachermademegooutoftheclass-room.→Iwasmadetogooutoftheclassroom(bytheteacher).Wesawhimplayfootballontheplay-ground.→Hewasseentoplayfootballontheplayground.2.情态动词 be过去分词,构成被动语态。