英语Grammar教学ppt课件

这是一份英语Grammar教学ppt课件，共24页。PPT课件主要包含了现在完成时，Sentences，Housing，Culture，Industry，Transport，Pair work，Homework等内容，欢迎下载使用。
学习目标1.掌握现在完成时的定义、基本结构及用法2.熟记现在完成时的高频时间标志词并灵活运用3.掌握动词过去分词的规则与不规则变化4.区分延续性/短暂性动词，学会句式转换5.辨析have been t与have gne t的用法差异6.能运用现在完成时完成各类基础题型
现在完成时的定义现在完成时是连接过去和现在的时态核心：体现过去的动作与现在存在关联主要表达三种核心含义：1.持续动作：过去发生，持续到现在仍在进行2.影响动作：过去发生，对现在造成具体影响/结果3.经历动作：到目前为止的人生经历或动作累计次数
主语+have/has助动词 + dne(过去分词)+其他
Present perfect tense
现在完成时的基本构成 ：
I/We/Yu/They + have + dne(过去分词）+其它。He/She/It + has + dne(过去分词）+其它。
______________ their hmewrk. (finish）He ______________his hmewrk. （finish)
have finishedhas finished
现在完成时的一般疑问句
Have yu arrived？
Has she arrived？
Have Tm and Jane arrived？
肯定句的主语和have/has调换位置变一般疑问句
Yes, I have. / N, I haven’t.
Yes, she has. / N, she hasn’t.
Yes, they have. / N, they have’t.
现在完成时基本结构（肯定句/否定句）
过去持续到现在的动作或状态过去的行为对现在产生影响动作已经发生0-多次
主语+have/has dne+其它
already,ever,just,never,recently,yet,befre
since,fr,in the past years,ver/during the years,in recent years, s far
When t use?
现在完成时与fr和since的用法
I have been here fr 10 days.
I have been here since 10 days ag.
I have been here since I was brn.
since+时间点（年月周日时）
I have been here since January 10th.
since+时间段+ag
since+一般过去时从句
现在完成时基本结构（疑问句）
时间标志词——持续类判断现在完成时的核心依据，持续类表动作延续至今1.fr + 时间段：表动作持续的时长（fr 3 years/fr a mnth）2.since + 过去时间点/从句：表动作起始点（since 2010/since he came here）3.s far/up t nw/until nw：到目前为止（可放句首或句末）例句：We have learned English since 2019.
现在完成时的肯定句、否定句与一般疑问句
肯定句否定句一般疑问句肯定回答否定回答
sb have/has dne (sth).
sb have/has nt dne (sth).
Have/Has sb arrived?
Yes, sb have/has.
N, sb haven’t/hasn’t .
I haveWe haveYu haveThey haveHe/She/It has
have nthas nt
=I’ve =We’ve=Yu’ve =They’ve =He’s/She’s/It’s
=haven’t =hasn’t
时间标志词——影响类影响类表过去动作对现在产生的结果/影响1.already：已经，仅用于肯定句，放助动词与过去分词之间2.just：刚刚，仅用于肯定句，位置同already3.yet：还（未），仅用于否定句/疑问句，放句末例句：He has just left. / Have yu finished the wrk yet?
What are the changes in yur hmetwn?
We used t live in small huses, but mst families have mved int new buildings.
The quality f life
Grammar Fcus 1: Usage
Use 1: DefinitinAn actin started in the past and cntinues t the present.
Key MarkersOften used with:fr, since
ExamplesHehas livedheresince2010.Ihave studiedEnglishfr5 years.
Grammar Fcus 2: Usage
An actin happened in the past and has a cnnectin with the present. (The exact time is nt mentined.)
Example 1: Cnsequence
Ihave lstmy key. (Result: I can't pen the dr nw.)
Example 2: Experience
Shehas seenthis mvie. (Result: She knws the stry nw.)
A: Hi! Lng time n see. I heard yu went back t yur hmetwn last mnth. Hw was the visit?B: Oh, it’s amazing!_____________________________________________.A: Ww, that’s great. My hmetwn has changed a lt t.___________________________________________________________________________.B: Really? ____________________________________________________.A: That’s cl. In my hmetwn, __________________________________.B: Times really have changed. I think ur hmetwns will becme even better in the future.A: I agree. I can’t wait t g back during the hliday t see mre changes!
Present perfect tense
Frm the past participles f verbs
When t use the present perfect tense
Frm the sentence structures
Time adverbials
have/has + dne
have/has+ nt + dne
Have/Has + subject+
Yes, subject + have/has.
N, subject + haven’t/hasn’t.
the present
Grammar Fcus: Structure
Psitive Sentences
I / Yu / We / Theyhave+ past participle / She / Ithas+ past participle ...
Negative Sentences
nt (haven't)+ past participle nt (hasn't)+ past participle ...
HaveI / yu / we / they + past participle / she / it + past participle
Shrt Answers
Yes, I/yu/we/theyhave. / N, 't.Yes, he/she/ithas. / N, 't.
Time adverbials
❀since + a specific time/+ a sentence in the simple past tense ❀ fr + a perid f time
❀ ver / in the (past / last) years “在(过去的)这几年间”
❀ s far, up t nw, until / till nw “到目前为止”
❀ time adverbials indicating the number f times 表示次数
Grammar Fcus: Past Participle
Regular Verbs (规则动词)
Rule: Add-ed(like the simple past)
finish - finished
change - changed
carry - carried
stp - stpped
Irregular Verbs (不规则动词)
Rule: N fixed rule (need t memrize)
buy - bught
fall - fallen
Practice A: Fill in the blanks
1. Sunshine Twn ______________ (change) a lt ver the years.
2. The gvernment ______________ (turn) part f the twn centre int a new park.
3. Recently, the air in ur twn ______________ (imprve) a lt.
4. Sme peple in the cuntryside ______________ already ______________ (mve) t new buildings.
5. Last year, the gvernment ______________ (build) an art museum.
6. I ______________ (nt visit) the museum yet.
Cmpulsry hmewrk:(1) Review the grammar rules.(2) Write an article abut the changes in yur hmetwn, using the present perfect tense.Optinal hmewrk:Interview yur classmates and knw mre abut the changes in their hmetwn.