初中英语学习阶段，核心语法是英语学习重点内容，今天学习哥和大家分享的是13个初中核心语法，一定要熟练掌握！
as句型 (1) as引导方式状语从句句型：“按照……;正如……” 例：As(it is)in your country, we grow wheat in the north and rice in the south.正如(像) 你们国家一样，我们北方种植小麦，南方种植水稻。 (2) as+形容词/副词原级+(a /an)+名词+as ;否定式：not as/so --- as (3) such + n. + as to do 如此……以致于…… (4) so + adj./adv. + as to do sth 如此……以致于…… (5) such...as... 象……之类的…… (接名词或定语从句) (6) the same +名词+as 和……一样的…… (接名词或定语从句) (7) as 引导非限制性定语从句 (8)引导时间状语从句，与while意义相近 (9) 引导原因状语从句，与 because的用法相近 (10) 引导让步状语从句 (1) prefer to do sth 例：I prefer to stay at home.我宁愿呆在家里。 (2) prefer doing sth (3) prefer sb to do sth (4) prefer to do sth rather than do sth ……宁愿…...而不愿... (5) prefer doing sth to doing sth (6) prefer sth to sth when句型 (1) be doing sth...when... 例：He was still smiling when the door opened and his wife came in.他正笑着的时候门突然开了，他妻子走了进来。 (2) be about to do sth ... when ... (3) had just done ... when ... seem句型 (1) It +seems + that从句 例：It seemed that everyone was satisfied.看来好像每个人都很满意。 (2) It seems to sb that ... (3) There seems to be ... (4) It seems as if ... 表示“相差…;增加了…”句型 (1) She is taller than I by three inches.她比我高三英寸 (2) There is one year between us.我们之间相差一岁。 (3) She is three years old than I.她比我大三岁。 (4) They have increased the price by 50%.他们把价格上涨了50% (5) His salary has rised to 10,000 yuan per month.他的工资已经涨到了每月10,000元。 what句型 (1) what 引导主语从句 例：What surprised me is that everybody seemed to be very indifferent to her.让我吃惊的是每个人似乎对她都很冷淡。[ indifferent adj.不关心的;冷漠的] (2) what 引导宾语从句 (3) what 引导表语从句 (4) what 引导同位语从句 too句型 (1) too ... to do ... 例：Politics is too important to be left to the politicians.(=Politics is so important that it can't be left to the politicians.)政治太重要了，不能由政治家来决定。 (2) only too ... to do ... 例：I shall be only too pleased to get home.我要回到家里就非常高兴。 (3) too + adj + for sth (4) too + adj + a + n. (5) can't … too +形容词 无论……也不为过 where句型 (1) where 引导的定语从句 例：This is the house where he lived last year.这就是他去年住过的房子。 (2) where 引导的状语从句 (3) where 引导的表语从句 wish句型 (1) wish that sb did sth 希望某人现在做某事 例：I wish I were as strong as you.我希望和你一样强壮。 (2) wish that sb had done sth 希望某人过去做某事 (3) wish that sb would/could do sth 希望某人将来做某事 would rather句型 (1) would rather do sth than do sth 宁愿做……而不愿做…… 例：She would rather die than turn against his motherland.她宁可死也不去背叛祖国。 (2) would rather have done sth 宁愿过去做过某事 (3) would rather sb had done sth 宁愿某人过去做过某事 (4) would rather sb did sth 宁愿某人现在或将来做某事 before句型 (1) before sb can/ could … 某人还没来得及…… 例：Before I could get in a word ，he had measured me.我还没来得及插话，他就给我量好了尺寸。 (2) It will be +时间+ before + 还有多长时间…… (3) had done some time before (才……) (4) had not done ... before ... 不到……就…… (5) It was not +一段时间+ before 不多久就…… 强调句型 (1) It is /was +被强调部分+that(who)... 例：It was I who wrote to my uncle yesterday.是我昨天给我叔叔写信的。 (2) Is/was it + 被强调部分 + that (who) ... (3) Where/who/what/how等特殊疑问词 + is/was it that ... (4) do/does/did +谓语动词 (强调谓语) 表示过去未实现的希望和计划句型 (1)would like to/ would love to have done sth. 例：I would like to have written to you.我本想给你写信的。 (2) was / were going to do sth.(用过去将来时态表示原打算做什么)
例：He is as good a player as his sister.他和他姐姐一样是位优秀的运动员。
例：She is such a fool as to believe what he said.她是一个如此的一个笨蛋以致相信了他所说的话。
例：He was so strong as to carry the heavy box.他是如此的强壮以致于能提起那重箱子。
例：He wished to be such a man as Lei Feng was.他希望成为一个像雷锋这样的人。
例：He is not the same man as he used to be.他不是从前的那样子了。
例：As is known to us, knowledge is power.众所周知，知识就是力量。
例：We get wiser as we get older.随着我们长大，我们也变得越来越聪明。
例：As it was getting very late, we soon turned back.因为越来越迟了，所以我们不久就回来了。
例：Child as he is, he knows much about science.尽管他是一个小孩，但他对科学了解得很多。
prefer句型
例：I prefer playing in defence.我喜欢打防守。
例：Would you prefer me to stay?你愿意我留下来吗?
例句：I prefer to stay at home rather than go out.我宁愿呆在家里而不愿出去.
例：I prefer watching football to playing it.我喜欢看篮球，不喜欢打篮球。
例：I prefer tea to coffee.我要茶不要咖啡。
例：We were about to start when it began to rain.我们刚要出发，天就开始下雨了。
例：I had just gone to bed after a very hard day when the phone rang.在劳累了一天之后我刚刚就寝，电话铃就响了。
例：It seems to me that she is right.我看她是对的。
例：There seems to be a heavy rain.看上去要有一场大雨。
例：It seemed that she couldn't come to class.看样子她不能来上课了。
例：We can learn what we do not know.我们能学会我们不懂的东西。
例：That is what I want.那正是我所要的。
例：I have no idea what they are talking about.我不知道他们正在谈论什么。
例：These shoes are much too small for me.我穿这双鞋太小了。
例：This is too difficult a text for me.
这篇课文对我来说太难了。
例：We cannot emphasize the importance of protecting our eyes too much.我们再怎么强调保护眼睛的重要性也不为过。
例：Where there is a will，there is a way.有志者事竟成。
He left his key where he could find.他将钥匙放在易找到的地方。
I will go where I want to go.我要去我想去的地方。
例：This is where you are wrong.这正是你错的地方。
例：I wish you had told me earlier要是你早点告诉我就好了。
例：I wish you would succeed this time.我希望你这次会成功。
例：I would rather have taken his advice.我宁愿过去接受他的意见。
例：I would rather I had passed the examination last week.我真希望通过上星期的考试。
例：Who would you rather went with you?你宁愿谁和你一起去?
例：It will be 4 years before he graduates.他还有四年时间变毕业了。
例：We had sailed four days and four nights before we saw land.我们航行了四天四夜才见到陆地。
例：We hadn’t run a mile before he felt tired.我们还没走到一英里路就觉得累了。
例：It wasn’t two years before he left the country.还没到两年他们离开了那国家。
例：Was it your brother that you met in the street?在街上你遇见的是你兄弟吗?
例：How is it that you will go to visit her tomorrow?明天你究竟怎样去看望她?
例：They do know the place well.他们的确很熟悉那个地方。
例：Lucy was going to watch a basketball match.Lucy 原打算看一场篮球比赛。