初中英语一般过去时和现在完成时的区别课件（19张PPT）

课件19张PPT。（Simple past tense 一般过去时）1. He has heard the song before.（Present perfect tense 现在完成时）2. He heard it two years ago.Simple past tense
一般过去时表示在过去某个时候发生的动作或存在的状态.I went to school by bike this morning.
I was at school yesterday afternoon.一般过去时结构:am, is, are --- was, were
V-ed用法：three days ago
Yesterday
Last …
a moment ago = just now
in the past
in 1997
when +过去时句子一般过去时时间状语：Let’s do some exercises:It is said that the old church _________ (build) from the year 1845 to 1848.
2. In China, the number of Internet users __________ (be) 55 million in 2002.
3. In1946,UNICEF ___________ (set) up to help children whose lives were changed because of the Second World War. was builtwaswas setPresent perfect tense
现在完成时现在完成时结构：助动词have/has+动词的过去分词用法1：1. I have already finished my homework.表示过去发生的某一动作对现在造成的影响或结果．NPF3. He ___________ (lose) his key , and he can’t get into his house now.has lost2. I have never seen him before.现在完成时用法1：already, yet, just, ever, never, before表示过去发生的某一动作对现在造成的影响或结果．时间状语：两 “去”have/has been to …
have/has gone to …去过某地去了某地have/ has been in …来/去/到/在某地他来中国两年了．He has been in China for two years.have/ has been (to) …去过某地我以前从未去过那儿．他们去过英国两次了你曾经去过美国吗？－你去那里了？－我去老师办公室了I have never been there before.I have been to England twice.Have you ever been to the USA?--- Where have you been? --- I have been to the teacher’s office.another placehave/ has gone to …去了某地Tom isn’t here. He _______________ Beijing.
2. --- Where is Mr. Li?
--- He _____________ Beijing, and he will come back in two weeks.has gone tohas gone to another place现在完成时用法2：表示过去已经开始，并持续到现在（包括现在在内）的动作或状态．NPF时间状语：1. for+一段时间2. since＋过去时间点yesterdaylast …three days ago1997this morningthensince＋过去时句子3.how longsince I was born　We have learned English for six years.　He has worked in the factory since he left school.　They have lived in Beijing since 1980.　How long have you studied in this school?现在完成时用法2：1.我们学英语六年了．
2.自1980年起他们就住在北京了．
3.自他毕业起他就在这个工厂工作了．
4.你在这个学校学习多长时间了．havekeepbe away (from)be in be onbe deadbe a member of／be inbe in 遇到表示一段时间的时间状语,瞬间动词必须改成延续性动词或短语。buy _______ borrow _________
begin _______ leave ___________
die _______ come/ go to _________
join _______________________
arrive at/ reach/ get to _______现在完成时用法2：Please translate the sentences into English李雷买这本字典3天了。
Lilei ____________________ for three days.
2. 他们搬到这儿他的爷爷就去世了．
　His grandfather ________________since they moved here.
3. 他两年前就离开家乡了．
　He _____________________________ since two years ago.has had the dictionaryhas been deadhas been away from his hometown现在完成时时间状语：in the past / last few years
recently
in recent years / months / days
by now / so far / up to now1. There __________ (not be) much rain in my hometown since the beginning of this month.
2. It ___________ （snow) twice in his hometown since a week ago.
3. So far, China _____________ (develop) about 1,360 kinds of green food.
4. Look, the small park here ____________ (turn) into a threater.
Let’s do some exercises:hasn’t beenhas snowedhas developedhas turned一般过去时与现在完成时1. A: I ____________ (buy) a dictionary.
　B: When _______ you ________ (buy) it?
　A: Last night.
　B: Where _______ you ________ (buy) it?
　A: In the new bookshop.did buydid buyhave bought2. My friend _____________ (buy) a car.
He __________ (buy) it two years ago.has boughtboughtThanks for listening