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初中英语语法大全：概念：经常、反复发生的动作或行为及现在的某种状况。时间状语：always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays, etc.
初中英语语法大全
一般现在时
概念：经常、反复发生的动作或行为及现在的某种状况。
时间状语：always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays, etc.
基本结构：①be动词；②行为动词
否定形式：①am/is/are+not; ②此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn't，同时还原行为动词。
一般疑问句：①把be动词放于句首；②用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。
现在进行时
概念：表示现阶段或说话时正在进行的动作及行为。
时间状语：now, at this time, these days, etc.
基本结构：am/is/are+doing
否定形式：am/is/are+not+doing.
一般疑问句：把be动词放于句首。
一般将来时
概念:表示将要发生的动作，或存在的状态及打算，计划或准备做某事
时间状语：tomorrow,next day,soon,in a few minutes....
基本结构：1、be going to 2、will/shall do
否定：1、 was / were not 2、行为动词前加didn't ，同时还原行为动词
一般疑问句：1、be 放于句首 2、will /shall 提于句首。
初中英语语法必考内容
宾语从句
①定义
在句子中起宾语作用的从句叫做宾语从句。
②连接词
that: I think that you can pass the exam.
Whether/if:I wonder if / whether I can get some advice from you.
Ask him whether / if he can come.
“Wh”: I don’t know what the word means.
I don’t know where he found the book.
只用whether的情况：
1. 与or not连用：
I don’t know whether it’s raining or not.
2. 与动词不定式连用：
He doesn’t know whether to accept the invitation.
3. 连接词前有介词时：
It depends on whether he is coming.
③时态
1. 主句是一般现在时态，从句根据实际情况而定(各种时态均可)
She wants to know what he has done for the exam.
2.主句是一般过去时态，从句用相应的过去的时态。
1)She said that she was a student.
2)She said that she would fly to Japan in a week.
3)She said that she had finished her homework already.
3. 如果宾语从句说的是客观真理、自然现象或事实时，这时宾语从句要用一般现在时态。
The teacher said that the earth goes round the sun.
定语从句
①定义
在复合句中修饰名词、代词的从句叫定语从句。
②先行词
先行词指人 who /that
先行词指物 which/ that
定语从句一般紧跟被修饰的名词或代词(即先行词)后
③关系代词
关系代词代替先行词在句子中担当成分，所以从句中不可再出现其他代替先行词的代词
④翻译方法 “…. 的”
Whom: 先行词指人，则代替先行词在定语从句中充当宾语(包括介词的宾语), 与who的区别是如果前面带介词则必须用whom
1. This is the teacher whomwho we like best.
2. I don’t like the boy to whom you are talking.
Whose : 指人或物，作定语，表示 “…的”
eg: Harry is the boy whose mother is our math teacher.
关系代词只能 that 的特殊情况：
1.先行词前有序数词修饰时：
This is the first gift that my parents bought me.
2.先行词前有形容词最高级修饰时：
This is the most exciting film that I have ever seen.
3. 先行词是不定代词something, anything等时.
e.g. Is there anything that you want in this shop