内容正文:
Unit10
语法专项课件
(现在完成时)
教学目标:
1.现在完成时的构成及注意细节。
2.现在完成时的句型。
3.现在完成时的主要用法(2个)。
4.has/have been in
has/have been to
has/have gone to的用法。
5.强化练习,巩固所学。
现在完成时构成:
主语 + have / has + V过去分词
Present perfect tense
现在完成时的构成
注意的细节
• 1. have (has)有人称和数的变化。
• 2.主语和have(has)的缩写( I’ve / we’ve you’ve / they’ve / he’s / she’s / it’s )。
• 3. have (has)词性的辨析(助动词和实义 动词)。
He’s ill in hospital. He’s been ill in hospital.
I have a book. I have bought a book.
动词过去分词的构成
1.一般在动词词尾直接加“ ed ”。
work---worked---worked
2.以“ e ”结尾的动词,在词尾加“ d ”。
live---lived---lived
3.以“辅音字母 + y ”结尾的动词,变“y” 为 “i”,再加“ ed ”。
study---studied---studied
4.重读闭音节结尾,末尾只有一个辅音字母,先 双写该辅音字母,再加“ ed ”。
stop--stopped--stopped
规则变化
现在完成时的句型
肯定句:主语 + have/ has + V过去分词
否定句: 主语 + haven't ( have not) +V过去分词
主语 + has't ( have not) + V过去分词
一般疑问句: Have/Has+主语+V过去分词
I haven’t finished my homework.
Have you finished your homework?
I have finished my homework.
结构
肯定回答:主语 + have / has
否定回答:主语 + haven't / hasn't
现在完成时句型练习
1. I have done my homework.
否定句: I _____ _____ my homework.
一般疑问句:____ you ____ your homework?
肯定、否定回答: Yes, ____ _____.
No, ____ ______.
2. He has seen the film.
否定句: He _____ ______ the film.
一般疑问句:_____ he ______ the film?
肯定、否定回答: Yes, _____ _____.
No, _____ _____.
haven't done
Have done
I have
I haven't
hasn't seen
Has seen
he has
he hasn't
现在完成时两大用法
用法1
1.表示过去发生或已经完成的某一动作对现在造成的影响或结果。
He has cleaned the blackboard. (他擦黑板了) 这句话表示的结果是黑板现在是干净的。
He has studied French. (他学过法语)
这句话所说明的结果是他现在懂法语。
现在完成时用法1连用词:
already “已经”用于肯定句
yet 用于:
否定句: 句末 “还(没)”
一般疑问句: 句末 “己经”
never 否定词 “从来没有”
ever “曾经”
just “刚刚”
before“以前”(用于现在完成时放 句末)
常见题型及应答策略
1. I ____ already _____ (finish)my homework.
2. ______ you ______(read) treasure island yet?
3.