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1、Unit4-Unit4-连词连词unless-as-unless-as-soon-assoon-as和和so.-.-.-thatso.-.-.-that【知【知识识构建】构建】(一一)定定义义状状语语从从句句由由从从属属连连词词引引导导, 从从属属连连词词不不充充当当句句子子成成分分, 只只起起连连接接作作用用。状状语语从从句句在在复复合合句句中中修修饰饰主主句句中中的的谓谓语语、形形容容词词或或副副词词, 根根据据意意义义上上的的不不同同, 可可分分为为: 条条件件状状语语从从句句、时时间间状状语语从从句、句、结结果状果状语语从句等。从句等。类类型型引引导词导词例句例句条件条件状状语语从句从
2、句if, unlessYou wont go to the party unless you have an invitation.除非你有除非你有请请柬柬, 否否则则你将无法参加聚会。你将无法参加聚会。时间时间状状语语从句从句as soon as,when, while,after, untilI will call you up as soon as I get home.我一到家就我一到家就给给你打你打电话电话。He was reading a book when the rainstorm came. 当暴当暴风风雨来的雨来的时时候候, 他正他正在在读书读书。结结果果状状语语从句从句s
3、o. . . that,such. . . thatHe is so tired that he cant eat any food.他累得吃不他累得吃不进饭进饭去。去。She is such a kind person that she always helps others.她是个好人她是个好人, 总总是帮助是帮助别别人。人。(二二)状状语语从句的注意事从句的注意事项项1. 在在条条件件状状语语从从句句和和时时间间状状语语从从句句中中, 通通常常用用一一般般现现在在时时表示一般将来表示一般将来时时。Unless we talk to someone, we will certainly f
4、eel worse. 除非我除非我们们找人聊聊找人聊聊, 不然我不然我们们肯定会感肯定会感觉觉更糟。更糟。2. 当当主主句句的的主主语语与与从从句句的的主主语语一一致致, 且且从从句句为为肯肯定定句句时时, so. . . that. . . 可以与可以与. . . enough to结结构相互构相互转换转换。He is so old that he can look after himself. =He is old enough to look after himself. 他足他足够够大了能照大了能照顾顾自己。自己。3. 当当结结果果状状语语从从句句表表达达否否定定意意义义时时, 可可与与too. . . to. . . 结结构构相互转换。相互转换。He is so young that he cant look after himself. =He is too young to look after himself. 他如此小以至于不能照顾自己。他如此小以至于不能照顾自己。
