3 Were trying to save the earth Section A Grammar focus-4c课件(共22张PPT) 人教版九年级全册.pptxVIP

Grammarfocus-4c;Inthislesson,youwill:;九（17）班;现在进行时:Presentprogressive;现在完成时:Presentperfect;1.Ididntuseto(like)himmuchwhenwewereatschool.

2.Didsheuseto(have)longhair?;Fillintheblankswiththecorrectformsoftheverbsinbrackets.;Fillintheblankswiththeappropriatemodalverbsfromthebox.;Makealistofthingsthatpeoplecandotohelptheenvironment.;;GrammarFocus;现在进行时:PresentProgressive;Whatafinedaytoday!

Look!Whataretheydoing?;usedtodosth.

表示过去常常做某事,而在往往不做了,后接动词原形。;被动语态：Passivevoice;TranslatethesentencesbyusingPassivevoice.

1.刚才一些老年人参观了博物馆。

2.工人们使用不同种类的机器工作。;结构:has/have+过去分词

标志词：already,yet,ever,never,since,for…

e.g.Ihaven’tfinishedmyhomeworkyet.;Completethefollowingsentences.

I_________(be)inBeijingfortwoyears.

2.I_____never_____(hear)ofthatmanbefore.

3.Tom__________(work)theresincetwoyearsago.

4.Thetwins___________(wash)theclothesforanhour.

5.He_________(play)basketballsincethreeyearsago.

6.Howlong____Sally_____(sing)yet?;1.情态动词本身有一定的词义,表示说话人的情绪、态度或语气,但不能单独作谓语,只能与其他动词构成谓语。常见的有:can(could),may(might),must,need,shall(should),will(would)等。;2.情态动词无人称和数的变化,后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。;Thinkaboutwhatyouhavelearntinthisclass.