连词和状语从句 PPT

He is working hard for fea大r家t好hat he should fail.
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4．条件状语从句 (1)providing/provided (that)假如，假若 Providing (that) no one has further questions，the meeting will be over. (2)on the understanding that＝on condition that在……条件 下
—Why were you absent?
—Because I was ill. 3．目的状语从句 (1)so that/in order that引导的目的状语从句中的谓语动词多 用can/could/may/might/will/would＋动词。
Please turn off the light so that I can go to sleep. (2)for fear that，in case，lest表示“以防，免得”。
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2．从属连词 (1)引导名词性从句的从属连词 引导名词性从句的从属连词有连接词：that，whether和if， 这些连接词在句中不充当任何句子成分；连接代词主要有： who，whom，whose，which，what等，它们在句中可作主语、 宾语、定语等；连接副词主要有：when，where，how，why 等，它们在句中可作状语。
It is two years since he joined the army. It is two years since he smoked.
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2．原因状语从句 在表示原因时，because语气最重，其次是as，since，now that，故在回答why问句或者在强调句对原因进行强调时，只能 用because。for是并列连词，表示推测的理由或者进一步说明， 不能放在句首，for前要用逗号。
You can either stay at home大家or好go fishing.
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(4)表示因果关系的并列连词：so(所以)，for(因为)。 It is morning，for the birds are singing. 注意：then(那么，因而)，thus(因而)，therefore(因此，所 以)等副词常可放在句首表示因果关系。 He was busy，therefore he could not come.
连词和状语从句
一、连词 1．并列连词 (1)表示联合关系的并列连词：and(和)，both...and...(既…… 又……)，ຫໍສະໝຸດ Baidueither...nor(既不……也不……)。
Neither I nor he has seen the film. (2) 表 示 转 折 关 系 的 并 列 连 词 ： but ， while( 而 ， 然 而 ) ， whereas(而)，nevertheless。 He is short，while his brother is tall. (3)表示选择关系的并列连词：or(或)，or else(否则)， otherwise(要不然)，either...or...(或……或……)。
I give you money on the understanding that you finish your homework.
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5．结果状语从句 注意such引导的结果状语从句与定语从句的区别。 试比较：
This is such an interesting book that everyone likes to read it. This is such an interesting book as everyone likes to read.
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6．目的状语从句与结果状语从句的区别 in order that可放在句首，只能引导目的状语从句；so that 引导目的或结果状语从句，不能放在句首。 试比较： He spoke so slowly that we all followed him.(结果状语从句) ＝He spoke slowly，so we all followed him.
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二、状语从句 1．时间状语从句 (1)before引导的从句中不用否定式谓语。常用如下句型： It is long before...(过了好久才……) It is not long before...(过了不久就……) (2)since后面所用动词不同，该动词所表示动作持续时间的 计算方法也不同。 since＋瞬间动词过去式(从该动作发生时算起) since＋持续性动词过去式(从动作结束时算起)
We know (that) the earth goes round the sun. What we need is more time. That’s what I want.
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(2)引导状语从句的从属连词 在句中作状语的从句叫状语从句，也叫副词性从句。它修饰 谓语、非谓语动词、状语或整个句子。状语从句由从属连词引 导，可表示时间、地点、条件、原因、结果、目的、让步、比 较、方式等。
He spoke slowly so (in order) that we could all understand him.(目的状语从句)
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7．让步状语从句 (1)as引导让步状语从句，作“尽管”解，用倒装句，语序 为：状语/宾语/表语/动词原形＋as＋主语＋谓语……。如果句首 是单数可数名词作表语，名词前无冠词。 Clever as you may be，you can’t do that. Clever boy as he is，he can’t solve the problem. (2)while有时引导让步状语从句，作“尽管”、“虽然” 讲，多用于句首。 While I admit the problems are difficult，I don’t agree that I can’t solve them.