英语语法英语语法状语从句状语从句状语从句的分类1
时间状语从句•按照引导词分类:•When,while,as:当……时,在……的同时•When/As/Whilehewaseatinghisbreakfast,heheardthedoorbell
•Since:自……以来•IthasbeentwoyearssinceIcametoBeijing
•从句动词为非延续性动词when•Theboycriedwhenhesawhismother
•从句动词为延续性动词while,as,when均可•while强调“在……的同时”•as强调“伴随”的状态•TomfellasleepwhileJerrywasgivingalecture辨析:when/while/as时间状语从句的破题方法真题演练•(2007上海)Hetransplantedthelittletreetothegarden____itwasthebesttimeforit
whereB
when•C
until扩展练习•(2008上海)•—AreyoureadyforSpain
Iwantthegirlstoexperiencethat____theyareyoung
whileB
untilC
before•其他引导词:•(1)until/till•延续性动词+肯定语气:到……为止•例:Walktillyoucometoawhitehouse
•非延续性动词+否定语气:到……才开始•例:Wedidn’tbeginourdiscussionuntilhecameback
真题演练•(2003上海)Agoodstorytellermustbeabletoholdhislisteners’curiosity_______hereachestheendofthestory