中考英语难点语法详解
中考英语难点语法详解
在初中英语教学中,语法的学习属于初级阶段,对以后系统学习英语至关重要。接下来学习啦小编为你整理了中考英语难点语法详解，一起来看看吧。
中考英语难点语法详解：what的三种用法
引导名词性从句的what在从句中作主语、宾语、表语或定语。
(1)具有疑问代词性质的what：意为“什么，什么样的”。如：
I don’t know what he needs. 我不知道他需要什么。(what在宾语从句中作宾语)
(2)在名词前表示感叹的what：意为“多么”。如：
Only then did I recognize what silly mistakes I had made. 只是在那时我才意识到我犯了多么愚蠢的错误。(what在宾语从句中作定语)
(3)具有关系代词性质的what：意为“所……的”。
相当于“the+名词+that”或者all that，即好像是既包括了先行词也包含了关系代词，因此，有学者称之为关系代词型what。如：
What (=The thing that) happened after that was interesting. 后来发生的事挺有意思。(what在主语从句中作主语)
China is not what (=the China that) used to be. (what在表语从句中作表语)
The boy dived into water and after what (the time that) seemed to be a long time, he came up again. 他跳进水里，过了好像很久之后，他才又从水里出来。(what在宾语从句中作主语)
中考英语难点语法详解：since和for
Since 用来说明动作起始时间，for用来说明动作延续时间长度。例如：
I have lived here for more than twenty years.我住在这儿二十多年了。
I have lived here since I was born. 我从出生起就住在这儿了。
注意：并非有for 作为时间状语的句子都用现在完成时。
I worked here for more than twenty years. (我现在已不在这里工作。)
I have worked here for many years.(现在我仍在这里工作。)
注意：用句型转换的方法，很容易排除非延续动词在有for/since结构的完成时中的误用。
(1)(对)Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.
(2)(错)Harry has got married for six years. = Harry began to get married six years ago, and is still getting married now.
显然，第二句不对，它应改为 Harry got married six years ago. 或 Harry has been married for six years.
中考英语难点语法详解：will与would的区别
1.表示意愿时的区别
will 表示现在的意愿，would 表示过去的意愿：
Go where you will. 你愿到哪里就到哪里。
She asked if I would go with them. 她问我是否愿意同他们一起去。
2.表示征求意见或提出请求的区别
主要用于第二人称的疑问句中，will 和 would 均可用，would 此时并不表示过去，而表示委婉语气：
Won’t you take off your coat? 你要不要把大衣脱掉?
Will you please post the letter for me? 请帮我寄了这封信好吗?
3.表示习惯和倾向性的区别
will 表示现在的习惯，would 表示过去的习惯：
This window won’t open. 这扇窗户经常打不开。
When he was a child, he would often go skating. 他小时候经常去滑冰。
would like / would love可视为习语，意为“想要”，其后接名词、代词或不定式：
I would like a cup of tea. 我想要杯茶。
We would love to go with him. 我们想同他一起去。
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