初中英语Section A课前预习ppt课件

这是一份初中英语Section A课前预习ppt课件，共24页。PPT课件主要包含了教学目标，教学重难点，Grammar，used to，Have ，taken，helped，considered，had，took等内容，欢迎下载使用。

used t的用法；现在进行时；被动语态；现在完成时；情态动词的用法。
1. 能记住本节课的单词，词组.2. 掌握各种时态的用法。
Present prgressive
Present perfect
Passive vice
(1) 含义：表示正在发生或进行的动作。(2) 基本结构：主语 + be + 现在分词（be 的形式随主语的变化而变化）(3) 基本用法：①表示现在正在进行的动作。特征：常常与nw或具体的时间连用，有时 句中会有感官动词来提示，或通过上下文来暗示。②表示现阶段一直进行的动作。这类动词常常是延续性动词。常与 at present, this week, these days等连用。③表示主语的特征、性格、能力等。
Grammar Fcus
used t意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。used t是个情态动词，其中的t是不定式符号，后面跟动词原形。在美式英语中,它的疑问式是：Did ＋主语＋use t d sth.？否定式是：主语＋didn't use…在英式英语中，它的疑问式应当是：Used ＋主语＋t d sth.？否定式应当是used nt t d sth.或use(d)n’t t d sth.。He used t stay up late. 他过去常熬到很晚。
初中阶段我们学习了八种被动结构，归纳如下：(1) 一般现在时的被动语态：am / is / are + 过去分词(2) 现在完成时的被动语态：have / has + been + 过去分词(3) 现在进行时的被动语态：am/ is / are + being + 过去分词(4) 一般过去时的被动语态：was / were + 过去分词(5) 过去进行时的被动语态：was / were + being + 过去分词(6) 过去完成时的被动语态：had + been + 过去分词(7) 一般将来时的被动语态：will / be ging t be+ 过去分词(8) 含有情态动词的被动语态：情态动词+be +动词的过去分词
(1) 含义：表示过去发生的动作对现在的影响。(2) 基本结构：主语 + have/has + 过去分词(3) 基本用法：①表示过去发生的动作，但强调对现在产生影响。特征：不能与具体的 时间状语连用。②表示过去发生的动作或存在的状态一直延续到现在，还可能继续下去。 常常与since, fr, in the past + 时间名词，in the last +时间名词等时间 状语连用，此时谓语动词要求是延续性动词。③表示一种“经历或体验”，即可以表示经历过也可以是从来都没有经 历过。
情态动词表示说话人对某一动作或状态的态度，如认为“可能”、“应当”、“必要”等。情态动词本身有一定的意义，但不能单独作谓语，也没有人称和数的变化。后面一般跟动词原形。
Fill in the blanks with the crrect frms f the verbs in brackets.
Je: _____ yu ever ______ (take) part in an envirnmental prject ?Eric: Yes, I have. I ______ (help) with a Clean-Up Day last year. It was __________ (cnsider) the biggest clean-up prject this city ____ ever ____ (have).
辨析：jin, jin in 和take part in
Je: Hw many peple ____ (take) part?Eric: I _____ (think) mre than 1,000 peple ______ (cme) t help ut.Je: That’s fantastic! I guess everyne in this city is ______ (try) t imprve the envirnment.Eric: Yes, we can’t affrd t ____ (wait) any lnger t take actin!
v. 承担得起(后果); 买得起
Fill in the blanks with the apprpriatemdal verbs frm the bx.
Peple __________ think that big things______ be dne t save the earth. Many frget that saving the earth begins with small things. Fr example, yu ____ save
can wuld culdhave t shuld mustmay/ might
electricity by turning ff the lights when yu leave a rm. Yu ______ als use reusable bags instead f plastic bags. I think it’s a great idea that yu nw ______ pay fr plastic bags in sme stres. And instead f driving t schl r wrk, yu __________ ride yur bike r walk. If it’s far, yu __________ take the bus. All these
small things ______ add up and becme big things that _________ imprve the envirnment. Let’s take actin nw!
Make a list f things that peple can d t help the envirnment and discuss yur list with yur partner.
A: I think that everyne shuld use public transprtatin.B: I disagree. It’s difficult fr parents with yung children t use public transprtatin…
Cmplete the fllwing sentences. I _________ (be) in Beijing fr tw years.2. I _____ never _____ (hear) f that man befre.3. Tm __________ (wrk) there since tw years ag.
has wrked
4. The twins ___________ (wash) the clthes fr an hur.5. He _________ (play) basketball since three years ag.6. Hw lng ____ Sally _____ (sing) yet?
have washed
用所给词的适当形式填空。1. The ld man used _____ (be) a teacher. 2. We shuld _____ (clean) the rm every day. 3. Lk! Tm _________ (sleep) in his rm. 4. Lts f trees __________ (plant) n the hill every year. 5. He _________ (live) here fr 20 years.
is sleeping
are planted
用括号里所给动词的正确形式填空
1. The girl ___________(dance) in the classrm.2. It's 5 'clck nw. Mike _________ (have)dinner.3. --_____ yu ever ____ (be) t the US? -- Yes, twice.4. -- May I speak t Jhn? -- Srry, he __________(g) t New Yrk. he will be back in tw days.5. --Did yu g t Jack's birthday? -- N,I ______________(nt invite).
Have been
was nt invited
1. He prmised t pick me up at the schl gate. Hwever, he _____ yet. A. didn’t arrive B. desn’t arrive C. isn’t arriving D. hasn’t arrived2. Ba Jin, ne f the greatest writers in China, ___ as “Peple’s Writer”.  A. is regarded   B. has regarded    C. is regarding   D. regards
Chse the best answer.
3. —Where is Tm? —He ______ in his rm. A. is readingB. readsC. readD. was reading 4. —May I g ut nw, Dad? — N. Yu _____ let yur mther knw first. A. can B. may C. need D. must
5. Her sn _______ Cke, but nw he ________ milk.A. used t drink ; is used t drinking B. used t drinking ; drinksC. is used t drinking ; used t drink D. is used t drink ; is drinking
Search fr sme infrmatin abut the endangered animals. Write a passage abut hw t prtect the endangered animals.