2014年秋高中英语 Module 5 The Great Sports Personality 易混词语辨、练、析讲解外研版必修5
误区之一：混淆while与when
【误】 She was o n the point of leaving while s omeone knocked at the door.
【正】 She was on the point of leaving when someone knocked at the door.
【析】 while意为“当……时候”，从句需用持续性动词或状态性动词；而when引导时间状语从句中的动词既可以是持续性动词也可是非持续性动词。
误区之二：错用till / until
【误】 Until / Till yesterday evening, I received her
e-mail from Shanghai.
【正】 I didn’t receive her e-mail from Shanghai u ntil yesterd ay evening.
【析】当until / till从句与肯定的主句连用时，主句谓语动词必须是持续性动词，而不可是非持续性动词。
误区之三：省略不当
【误】 While was wal king down the street I noticed a police car in front of number 88.
【正】 While walking down the street I noticed a police car in front of number 88.
【析】时间、条件、让步等状语从句中，如果从句主语与主句主语一致或是it，且从句中含有动词be的
