2. 条件状语从句
难点链接
1)引导条件状语从句的连词有if（如果）、unless（除非）等，条件状语从 句也像时间状语从句一样，如果主句用将来时，从句要用现在时代替将来时。 如：What shall we do if it snows tomorrow? Don‟t leave the building unless I tell you to. 2) unless在意义上相当于if．．．not。 You will fail unless you study hard．＝You will fail if you don't study hard． 3) “祈使句 + and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复 合句。其中，and表示句意顺承；or表示转折，意为“否则”。例如： Hurry up, or you‟ll be late.=If you don‟t hurry up, you‟ll be late. Study hard and you will pass the exam.=If you study hard, you will pass the exam. 4）用介词with, without可以把条件状语从句改写成简单句： If there is no water, the fish may die. = Fish may die without water. If you help me, I‟ll finish my task on time. = With your help, I‟ll finish my task on time.
难点链接
注意: 在时间状语从句中，主句和从句之间的时态应按下列规律确定。
1）主句一般将来时，从句用一般现在时（特别是用 as soon as 引导从句 时）：The boy will be a writer when he grows up. I‟ll ring you up as soon as I get to New York.
难点链接
(3)so…that和such...that 在由so...that引导的结果状语从句中，so是副词，与形容词连用。其结构 是: “...so + 形容词（副词）+ that + 从句”。例如： He was so glad that he couldn‟t say a word. The hall is so big that it can hold 2,000 people. Mother lives so far away that we hardly ever see her. 在由such…that引导的结果状语从句中，such是形容词，它修饰的可以是 单数或复数可数名词，也可以是不可数名词；名词前面可以带形容词，也可 不带。如果是单数可数名词，前面需加不定冠词a或an。例如： It was such a hot day that nobody wanted to do anything. He had such long arms that he could almost touch the ceiling. He made such rapid progress that he did very well in the mid-term. 有时上述两种结构是可以互换的。例如： It was such a wonderful film that all of us wanted to see it again. =The film was so wonderful that all of us wanted to see it again. It is such an important match that nobody wants to miss it. =The match is so important that nobody wants to miss it.
难点链接
1.时间状语从句
引导时间状语从句的连词有：while, when, as, as soon as, till, until, not…until, before, after, since, etc． 1）when，while，as ①三者均可表示“当……的时候”，如果主句表示的是短暂的 动作，而从句表示的是一段时间，三者可通用。如： I met Ka ng Li as／ when／ while I was walking along the street． ②as 和when都可与终止性动词连用， while只能与延续性动 词连用。如： It was snowing when we got to the airport． （不能用 while） ③as强调主句与从句表示的动作同时发生；while强调主句表 示的动作持续于while所指的整个时间内；when可指主、从句 所述动作同时或先后发生。如： He sang as he went along． Please write while I read． When he reached home, he had a little rest．
难点链接
难点链接
时间状语从句中较难掌握的几点：
① until (till) 直到，在用 until 表达时间状语的句子中，主句中的动词是 要十分小心去选择。如动词是持续性动词，它要用肯定句，如： I studied hard until 12 o'clock last night. 如果动词是瞬间截止性动词，则要用否 定句，如： He didn't go to bed until his mother came back ② 由since， for， by， before 来引导的时间状语从句。 since 引导的 时间状语是动作的开始时间，如： I have studied English since 1990. 而由 by 引导的时间状语通常是动作的结束时间，如： I had learned 25 English songs by the end of last term.而before 则多用于完成时， ago 则多用于一般过去时，如： He had finished his work before twelve yesterday I left my hometown two years ago ③ 在状语从句中用一般现在时或一般过去时表示将来。它们可能是主句用 一般将来时，从句用一般现在时，如： If it rains, they won’t go to the park on Sunday 也可以主句是一般过去时，从句用过去将来时，如： He said if it rained the next day he would not go to the park 考 试中常见的考点有：要学生区别是条件、时间状语从句还是宾语从句，因在 宾语从句中该用什么时态用什么时态，如： I want to know if he will come here tomorrow 在宾语从句中的条件状语从句与主句的关系，如： I want to know if it rains he will come here tomorrow
2) before, after before表示主句发生的动作发生在从句动作之前，意为“在……之 前”。 after表示主句发生的动作发生在从句动作之后，意为 “在…… 之后”。如： They had already had breakfast before they went to school They talked about the party after the people left. 3) until, till until和till在肯定句中表示“直到……为止”，主句要用延续性动词；在否定句 中，表示“直到……才”，主句常用终止性动词，这时till和until可用 before替换。如： I waited till／ until he arrived． I will wait until he comes. We won't start until／ till／ before Bob comes． 4) as soon as 表示主句发生的动作发生在从句动作之后， 意为“一…就…”。如果主句 是一般将来时，情态动词加动词原形或祈使句时，时间状语从句用一般现在 时。如： My brother went out as soon as I got home. I'll phone you as soon as I arrive in Tonghua． 5）since： 表示 “自从…以来”，从句中常用过去时，主句用一般现在时或现在完成时. （对since 引导的时间状语提问要用how long).如： Where have you been since I saw you last？
第二篇 句法
状语从句
复习要点 1.时间状语从句 2. 条件状语从句 3. 比较状语从句 4. 结果状语从句 5. 原因状语从句 6. 目的状语从句 7. 让步状语从句 8.方式状语从句 9. 地点状语从句
The Adverbial Clause 状语从句
状语从句是副词性从句，其句法功能是修饰谓语或整个句子 等，在句中作状语，通常由从属连词引导。 状语从句不仅是初中英语学习的重点，而且也是每年中考必 考的内容之一。命题主要集中在引导状语从句的连词、状语从句 的时态等方面；从九大状语从句来看，应将复习重点放在时间状 语从句、条件状语从句、结果状语从：
When the lights are red, the traffic must stop.
3) 主句为祈使句时，从句用一般现在时： Please don‟t go to bed before you finish your homework.
4) 主句为一般过去时，从句也用过去时态： I liked reading when I was young. 5）在带有till或until引导的时间状语从句的主从复合句里，如果主句用肯定式， 其含义是“一直到……时”，谓语动词只能用延续性动词。如果主句用否定 式，其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间 动词。例如： The young man read till the light went out. Let‟s wait until the rain stops. We won‟t start until Bob comes. Don‟t get off until the bus stops.