求中学英语语法!
来源:百度知道 编辑:UC知道 时间:2024/06/17 15:21:16
我今年高二,基础很不好,需要恶补!谢谢!
一、 一般现在时:
1.概念:经常、反复发生的动作或行为及现在的某种状况。
2.标志词: always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
3.基本结构:动词 原形 (如主语为第三人称单数,动词上要改为第三人称单数形式)
4.否定形式:am/is/are+not;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。
6.例句:. It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
二、 一般过去时:
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2.标志词:ago, yesterday, the day before yesterday, last week,last(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago
3.基本结构:be动词;行为动词 的过去式
4.否定形式:was/were+not;在行为动词前加didn't,同时还原行为动词。
5.例句:She often came to help us in those days
三、 现在进行时:
1.概念:表示现阶段或说话时正在进行的动作及行为。
2.标志词:now, at this time, these days, etc.
3.基本结构:am/is/are+doing
4.例句: How are you feeling today?