什么是四看三让二听一感觉半帮助一感指的是feel(感觉)二听指的是listento(听)、hear(听见)三让指的是let、make、have四看是指watch、see、look、notice、observe半帮助是指help.因为既可以说helpsbdosth亦可以说helpsbtodosth英语中有些动词跟不定式作宾语补足语时省去了to,其中诀是:一感二听三让四观看主动to不见,被动to来见,有些谓语动词主动句中用省to的不定式作宾补,变被动时一定要加上to.例句:1、weheardhimsingthissongintheclassroom.--hewasheardtosingthissongbyusintheclassroom.2、Weoftenhearhersingthissong.--Sheisoftenheardtosingthissong.3、Letmelistentoyousingthesong.--Youwillbelistenedtosingthesongbyme.4、Theteachermademegooutoftheclassroom.--Iwasmadetogooutoftheclassroom(bytheteacher).5、Tomoftenmakeshissisterwashhisclothes.--Tom’ssisterisoftenmadetowashhisclothes.6、Wesawhimplayfootballontheplayground.--Hewasseentoplayfootballontheplayground.就是主动的时候省略to.被动的时候就要加上to.