小学英语五年级知识点汇总-c7娱乐电子游戏官网
五年级是小学学习的攻坚期,其中英语的语法也到了开始有点复杂的时期,同学们需要认真学习才能提高英语成绩。下面小编给大家分享小学英语五年级知识点汇总,希望对大家有所帮助。
小学英语五年级知识点汇总
在过去的时间里,两个动作中,发生在前的那个动作要用过去完成时。
结构:had 过去分词
after she had finished her homework, she went shopping.
they had sold the car before i asked the price.
the train had left before i arrived at the station.
after/before引导的时间状语从句放在句首要在句子后面加逗号,如果放在主句后则不用加。
1. 变疑问句将助动词移到句首. had she finished her homework?
2. 变否定句在助动词后面加not. she hadn’t finished her homework.
3. 肯定回答及否定回答. yes, she had. no, she hadn’t.
4. 特殊疑问句: what had she done?
构成:主语 助动词have, has 过去分词
用法: 1) 表示过去发生的和现在有某种联系的动作,常和just, usually, already, since等时间副词连用
i have just had lunch. (饱了,不用再吃了)
he has had a cup of tea.(不渴了,不用再喝)
they have already had their holiday. (不能再度假了)
the boy has already read the book. (已经知道书的内容了,不用再看了)
2) 询问别人是否做过某事一般用现在完成时:
have you finished your homework?
have you been to beijing?
have he seen the film?
3) 表示开始于过去并持续到现在的动作
i have lived in beijing for twenty years.
i have worked for this school for 1 year.
4) 表示一种经历,经验:去过…地方,做过…事情,经历过…事情
i have never had a bath.
i have never seen a film.
i have never been to cinema.
i have ever been to paris.
have been to表示去过,have gone to 表示去了
i have been to london.(人已经回来)
he has gone to london.(人还在那里)
5) 表示一种结果, 一般不和时间副词联用
i have lost my pen.
i have hurt myself.
he has become a teacher.
she has broken my heart.
句型变化:★变疑问句将助动词移到句首,变否定句在助动词后面加not.
have you lost your pen? i have not lost my pen.
★肯定回答及否定回答
yes, i have. no, i have not.
★特殊疑问句:
what have you done?
what has he done?
一般过去时与现在完成时的区别:凡是有明确的表示过去的时间状语的句子为过去时。
注意:有些动词表示的动作有一个终点,不能再延续,因此不能和表示一段时间状语连用.
错:i’ve left beijing for 3 days.
对:i left beijing 3 days ago. i have been away from being for 3 days.
表示过去发生的动作或事件, 常和表示过去的时间状语连用,如yesterday, last night, the day before yesterday, 3 days ago,
含有be动词的句子, 将动词变为过去式,am, is的过去式为was,are的过去式为were.如:i was at the butcher’s.
you were a student a year ago.
the teacher was very beautiful ten years ago.
★变疑问句将be动词移动到句首
were you at the butcher’s?
were you a student a year ago?
was the teacher very beautiful ten years ago?
★变否定句在be动词后面加not
i was not at the butcher’s.
you were not a student a year ago.
the teacher was not very beautiful ten years ago.
★肯定回答否定回答
yes, i was. no, i was not.
yes, you were. no, you were not.
yes, he/she was. no, he/she was not.
★特殊疑问句:
what did you do? (必背)
不含有be动词的句子,将动词变为过去式
i finished my homework yesterday.
the boy went to a restaurant.
the sawyers lived at king street a year ago.
★变疑问句在句首加did, 动词变为原型
did you finish your homework yesterday?
did the boy go to a restaurant?
did the sawyers live at king street a year ago?
★变否定句在主语和动词之间加did not
i did not finish my homework yesterday.
the boy did not go to a restaurant.
the sawyers did not live at king street a year ago.
★肯定回答及否定回答
yes, i did. no, i didn’t.
yes, he did. no, he didn’t.
yes, they did. no, they did not.