grammar(2)现在完成时.ppt

1、Welcome to Unit 1past and present现在完成时,(2),Task 1. Acting A:_ you _ (see ) any exhibitions recently ? B:No,I _.What about you ? A:Well,I _ (see) one .I _ (see ) it at the history museum last week . B:Whats it about ? A:I _ (forget ) the title.Its about changes in Jianhu over the past century .,Have,

2、seen,havent,have seen,saw,have forgotten,Task 2 现在完成时的构成,现在完成时由： “助动词have(has) +过去分词”构成。 过去分词构成方法； 一，规则动词过去分词构成方法（四种） （同过去式方法一样） 1,一般直接加ed,2,以e结尾加d,3,以辅音字母+y变y为i再加ed,4,双写加 ed 二,不规则动词过去分词构成方法 (见121表),Task 3 Filling (过去分词) 1.规则变化. (1) visit _ (2) move_ (3)study _ (4) stay _ (5)plan_ 2.不规则变化 (1)be _ ea

3、t _ fall_ (2)write _ forget _ ride _ (3)know _ throw _ grow _ break_ give _ take _ see _ (4)make _ sit _ stand _ say _ tell _ keep _ sleep _ smell _ (5) sing _ begin _ swim_ ring _,visited,moved,studied,stayed,planned,been,eaten,fallen,written,forgotten,ridden,known,thrown,grown,broken,given,taken,s

4、een,made sat stood said,told kept slept smelt,sung begun swum rung,Present perfect tense 现在完成时,构成: 用法一：,表示过去发生的某一动作对现在造成的影响或产生的结果.现在完成时这一时态强调是过去动作与现在的联系,也就是强调现在的影响和结果.,have/has + 过去分词,用法二： for+段时间 since+点时间 since+句子（过去时） E.g. Kate has lived here for 3 years. Kate has lived here since 3 years ago. Ka

5、te has lived here since she came to China.,表示过去某个时间开始的动作或存在的状态，一直持续到现在并可能还将持续下去。动词使用延续性动词。常与for或since引导的时间连用,Task 4 翻译句子: 1.他们自从在小时候就认识了. 2.他已经看过很多大片. 3.自1998年以来,他一直在香港. 4.这块空地已经变成了一个漂亮的花园.,This open space has become a pretty garden.,He has been in HongKong since 1998.,He has watched many great film

6、s.,They have known each other since they were children.,This open space has turned into a pretty garden .,时间状语 (提示词) already已经（肯）, just刚（肯), yet,(否.问) 还没有， ever曾经(问), never(否)从不, before以前, recently最近, for计+时间段, since自以来+时间点(或一般过去时的句子) until now直到现在, so far(到目前/现在为止), over the past few/20 years,近期间，a

7、ll ones life 一生, 次数:once ,twice,three times）,Task 5 Explaining Open your booksat page 16. Lets study the table( ). And see some examples,表格,1. Have you done your homework_? ( for, just, yet) 2. I have_ been to Chengdu. (ever, never, yet) 3. He has_ washed the dishes. (already, ever, for)4. He has wo

8、rked there_ he left school. (already, just, since) 5. Have you cleaned your room_? ( for, just, yet),6. She has known Sam_ nine years. ( for, never, since) 7. They have_ arrived. (ever, just, yet) 8. Have you_ ridden a horse? (ever, for, yet) 9. She has known Fred_ they were at primary school. (alre

9、ady, just, since) 10. We have not completed the project_. (already, for, yet),翻译句子 1. 我最近住在学校.(recently) 2. 他刚刚来这学校.(just) 3.我在这学校学习二年了.(for two years) 4.自从2005年我就在这学校学习.(since 2005) 5.自从二年前我就在这校学习了.(since two years ago),I have lived in this school recently.,I have just come to this school 。,I have studied in this school for two years.,I have studied in this school since 2005.,I have studied in this school since t