以下是初一到初三比较重点的语法、句型等：

1. 一般现在时：主语+动词原形（第三人称单数加s）
例：I play basketball every weekend.
2. 一般过去时：主语+动词过去式
例：I watched a movie last night.
3. 现在进行时：主语+be动词（am/is/are）+动词ing
例：She is reading a book now.
4. 一般将来时：主语+will+动词原形
例：I will go to the park tomorrow.
5. 现在完成时：主语+have/has+动词过去分词
例：He has finished his homework.
6. 情态动词can/could：表示能力、许可等
例：I can swim.
7. 情态动词should/ought to：表示应该、应当
例：You should study hard for the exam.
8. 疑问句：用疑问词（what/where/when/why/how等）开头
例：What is your name?
9. 肯定句与否定句：用助动词（do/does/did）+not
例：He does not like coffee.
10. 定语从句：用关系代词（who/whom/whose/which/that）引导
例：The girl who is wearing a red dress is my sister.
11. 状语从句：用连词（when/while/if/because等）引导
例：I will go to bed early if I feel tired.
12. 并列句：用连词（and/but/or）连接
例：I like apples and bananas.