- Unit 1 What's the matter?
- Section A
- Section B
- Unit 2 I’ll help to clean up the city parks.
- Section A
- Section B
- Unit 3 Could you please clean your room?
- Section A
- Section B
- Unit 4 Why don't you talk to your parents?
- Section A
- Section B
- Unit 5 What were you doing when the rainstorm came?
- Section A
- Section B
- Unit 6 An old man tried to move the mountains.
- Section A
- Section B
- Unit 7 What's the highest mountain in the world?
- Section A
- Section B
- Unit 8 Have you read Treasure Island yet?
- Section A
- Section B
- Unit 9 Have you ever been to a museum?
- Section A
- Section B
- Unit 10 I've had this bike for three years.
- Section A
- Section B
人教新目标版初二下学期英语
《Section B》语法解析
现在完成时
1.现在完成时的用法
现在完成时用于表示过去发生或已经完成的动作对现在造成的影响或结果,或表示从过去某一时间开始一直持续到现在的动作或状态,常与just,yet,ever,never,already,so far,by now等连用。
2.现在完成时的结构
现在完成时由“助动词have/has+过去分词”构成。
【口诀巧记忆】现在完成时的构成和标志:
have/has在前面,过去分词在后面;
以前(before)从来不(never)出现,
最近(recently)曾经(ever)一(once)两遍(twice),
自从(since)刚刚(just)时间段(for+时间段),
迄今(by now/so far)已经(already/yet)很明显。
3.现在完成时的基本句型
句型 | 结构 | 例句 |
肯定句 | 主语+have/has+过去分词+其他. | Ihavealreadywatchedthe movie. 我已经看过这部电影了。 |
否定句 | 主语+have/has+not+过去分词+其他. | Ihaven't seenour dog since yesterday. 我从昨天起就没见过我们的狗。 |
一般疑问句 | —Have/Has+主语+过去分词(+其他)? —Yes,主语+have/has. / No,主语+haven't/hasn't. | —Haveyoumademany friends in this new school? 你在这所新学校交了很多新朋友吗? —Yes,Ihave./No,Ihaven't. 是的,我交了。/ 不,我没有。 |
特殊疑问句 | 特殊疑问词+have/has+主语+过去分词(+其他)? | Wherehaveyoubeenduring the holiday? 假期你去哪里了? |
4.现在完成时和一般过去时的区别
区别 | 现在完成时 | 一般过去时 |
意义 | 现在完成时强调过去发生或已经完成的动作对心在造成的影响或结果。 | 一般过去时表示过去某时发生的动作或单纯叙述过去的事情。 |
标志词或短语 | for,since,so far,ever,never,just,yet,till,until,up to now,in past years等 | yesterday,last week,ago,in 1960,just now等 |
Section B