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状语从句的省略：
如果从句的主语和主句的主语一致（或从句主语为it), 从 句的谓语又包含动词be，则从句中的“主语+be”部分可 以省略。
If+(主语/it+be)+形容词/v-ing/done/介词，主+谓+宾。
1. Once ______(read), the book can't be forgotten.
4. I'm sorry you've been waiting so long, but it ' ll be some time _____ Brain gets back.
2. 地点状语从句 由where/wherever 引导 考点：区分where 引导的地点状语从句和定语从句：定 语从句前有表示地点的先行词（名词/代词）；地点状语 从句前面没有先行词。
newspapers. 2) 并列句：由并列连词（and, but, or等）或分号（；）把 两个或两个以上的简单句连在一起构成。
e.g. You help him and he helps you. The future is bright; the road is tortuous. 前途是光明的， 道路是曲折的。 3）复合句：含有一个或一个以上从句的句子。复合句包 含：名词性从句（主语从句、宾语从句、表语从句和同位 语从句）、定语从句和状语从句等。
3. 让步状语从句 1.由although, though,while , even though, even if “尽管” 引导的从句, 不可与but连用。 2. as ,though引导状语从句需要倒装，句首的名词不用冠 词
形容词/名词+as/though+主语+其他，主+谓+宾
Child as he is , he knows a lot.
专题复习：语法第七讲 并列句和状语从句
1）简单句：只有一个主语（或并列主语）和一个谓语（ 或并列谓语）。
e.g. He often reads English in the morning.
Tom and Mike are American boys.
She likes drawing and often draws pictures for the wall
并列句的并列连词和副词的考查：
转折并列句：
1. but 与however的区别 but连词，无逗号隔开 however 副词，有逗号隔开，位置灵活 2. yet与but yet与but可以互换使用，不可连用。 yet 可与and ,though/although连用；but 不可。
It is strange,but/yet it is true. Though/Although he was ill, yet he managed to come . The book is not thick, and yet it's hard to read.
Bam boo grows best in places where it is warm and where it rains often. ＝Bamboo grows best where it is warm and where it rains of ten. 温暖而多雨的地方最适合于竹子生长。
e.g. The foreign visitors took a lot of pictures when they
were at the Great Wall.
简单句：主+谓+宾 拓展： 状语，主+谓+宾.
或 主+谓+宾, 状语.
并列句：主谓宾+并列连词+主谓宾.
复合句：主谓宾, 状语从句（连词+主谓宾）。
2.When______(ask) for his views about his teaching job,Phil ip said he found it very interesting and rewarding.
3.The experiment shows that proper amounts of exercise, if _ ______(carry) out regularly,can improve our health.
1. It will be some time __
2. It was not yet eight o'clock______ he arrived home.
3. That was really a splendid evening. It's yea rs ______ I enjoyed myself so much.
by the time, the moment, the minute, every time, next time, l ast time, the first time,
固定句型： 1. It will/won't be +一段时间+before… 要过多长时间才……/用不了多久就…… 2. It was/wasn't +一段时间+before…… 过了一段时间发生了某事/不久就发生了某事 3. It is /has been+一段时间+since…… 从……以来已经多长时间了 4.It was +具体时间+when+主语+did sth. 当某事发生时，时间是……
状语从句的分类：
1. 时间状语从句 2. 地点状语从句 3. 条件状语从句 4. 让步状语从句 5. 原因状语从句 6. 结果状语从句 7. 方式状语从句
1. 时间状语从句 引导时间状语从句的连词：
when, while, as, before,since, after,till/until, as soon as, hard ly…when, no sooner…than, 引导时间状语从句的名词: