單元語法歸納與練習(xí)ppt課件

1、單元語法歸納與練習(xí)單元語法歸納與練習(xí)if if 引導(dǎo)的條件狀語從句引導(dǎo)的條件狀語從句1.1.時態(tài)時態(tài) 在在ifif引導(dǎo)的條件狀語從句的主從復(fù)合句中引導(dǎo)的條件狀語從句的主從復(fù)合句中, ,假設(shè)主句為普通未來時假設(shè)主句為普通未來時, ,那么從句運用普那么從句運用普通通 如今時表未來。如今時表未來。 If you ask him,he will help you. If you ask him,he will help you. 假設(shè)他請他協(xié)助假設(shè)他請他協(xié)助, ,他會幫他的。他會幫他的。2.2.同義句轉(zhuǎn)換同義句轉(zhuǎn)換 if if引導(dǎo)的條件狀語從句可以轉(zhuǎn)換成簡單句引導(dǎo)的條件狀語從句可以轉(zhuǎn)換成簡單句, ,其

2、方法如下其方法如下: :(1)(1)借助借助“祈使句祈使句+and/or+and/or+簡單句。其中簡單句。其中andand表示句意順承表示句意順承,or,or表示轉(zhuǎn)機。例如表示轉(zhuǎn)機。例如: : If you work hard,youll pass the exam. If you work hard,youll pass the exam. =Work hard,and youll pass the exam. =Work hard,and youll pass the exam. 假設(shè)他努力學(xué)習(xí)假設(shè)他努力學(xué)習(xí), ,他就會經(jīng)過考試。他就會經(jīng)過考試。(2)(2)借助介詞借助介詞withwit

3、h或或withoutwithout來轉(zhuǎn)換。例如來轉(zhuǎn)換。例如: : If you help me,Ill finish my job soon. If you help me,Ill finish my job soon. =With your help,Ill finish my job soon. =With your help,Ill finish my job soon. 假設(shè)他幫我假設(shè)他幫我, ,我將很快完成我的任務(wù)。我將很快完成我的任務(wù)。 If there is no water,fish may die. If there is no water,fish may die. =Fi

4、sh may die without water. =Fish may die without water. 假設(shè)沒有水假設(shè)沒有水, ,魚能夠會死。魚能夠會死。情態(tài)動詞情態(tài)動詞shouldshould表建議表建議 should should表建議表建議, ,意為意為“應(yīng)該應(yīng)該, ,后跟動詞原形后跟動詞原形; ;變否認句時變否認句時shouldshould后加后加not,not,構(gòu)成構(gòu)成shouldnshouldnt;t;變疑問句時變疑問句時, ,把把shouldshould提到主語前。提到主語前。He should get up early.He should get up early.他應(yīng)該

5、早起。他應(yīng)該早起。He shouldnHe shouldnt stay up.t stay up.他不應(yīng)該熬夜。他不應(yīng)該熬夜。Should he stay up?Should he stay up?他應(yīng)該熬夜嗎他應(yīng)該熬夜嗎? ?Yes,he should.Yes,he should.是的是的, ,他應(yīng)該。他應(yīng)該。No,he shouldnNo,he shouldnt.t.不不, ,他不應(yīng)該。他不應(yīng)該。.單項選擇單項選擇( )1.Johnson wont answer the phone if he ( )1.Johnson wont answer the phone if he the num

6、ber.(2021the number.(2021廣東廣東) ) A.knew A.knew B.doesnt knowB.doesnt know C.will know C.will knowD.didnt knowD.didnt know( )2.If it ( )2.If it sunny tomorrow,I will go shopping with my friend in sunny tomorrow,I will go shopping with my friend in the supermarket.(2021 the supermarket.(2021西寧西寧) ) A.

7、will be A.will beB.beB.be C.is C.is D.wasD.was( )3.I wonder if it ( )3.I wonder if it rain tomorrow.If it rain tomorrow.If it rain,Ill go rain,Ill go hiking with my friends.(2021 hiking with my friends.(2021巴中巴中) ) A.will;isnt A.will;isntB.doesnt;wontB.doesnt;wont C.will;doesnt C.will;doesntB BC CC

8、C( )4.The environment is terrible.( )4.The environment is terrible. I think it will be even worse I think it will be even worsethe government takes action the government takes action to protect it.(2021 to protect it.(2021煙臺煙臺) A.until A.until B.when B.when C.ifC.if D.unless D.unless( )5.To keep chi

9、ldren safe,we ( )5.To keep children safe,we put the things like knives and put the things like knives and medicine away in our house.(2021 medicine away in our house.(2021廣東廣東) A.may A.may B.should B.should C.can C.can D.mightD.mightD DB B.句型轉(zhuǎn)換句型轉(zhuǎn)換6.Lisa should drink some hot milk.(6.Lisa should dri

10、nk some hot milk.(改為普通疑問句改為普通疑問句) ) drink some hot milk? drink some hot milk? 7.Hurry up,or you will be late for school.(7.Hurry up,or you will be late for school.(改為同義句改為同義句) ) you you hurry up,you will be late for school. hurry up,you will be late for school. 8.You ride your bike.You will be late.

11、(8.You ride your bike.You will be late.(用用ifif連成一句連成一句) ) You You late late you ride your bike. you ride your bike. 9.If I go to visit her,Ill bring her some flowers.(9.If I go to visit her,Ill bring her some flowers.(對畫線部分提問對畫線部分提問) ) you you you go to visit her? you go to visit her? 10.Youll be ab

12、le to get there on time if you take the early bus.(10.Youll be able to get there on time if you take the early bus.(改為改為 同義句同義句) ) the early bus, the early bus, youll be able to get there on time. youll be able to get there on time. ShouldShouldLisaLisaIfIfdontdontwillwillbebeififWhatWhatwillwilldod

13、oififTakeTakeandand易錯提示易錯提示: :1.advise1.advise為動詞為動詞, ,其名詞方式為其名詞方式為advice,advice,作不可數(shù)名詞。作不可數(shù)名詞。2.2.調(diào)查調(diào)查ifif引導(dǎo)的條件狀語從句。句意引導(dǎo)的條件狀語從句。句意:西莉亞西莉亞, ,假設(shè)這個周末不下雨的話假設(shè)這個周末不下雨的話, ,就來就來 參與我們的超級夏令營吧。句中參與我們的超級夏令營吧。句中ifif意為意為“假設(shè)假設(shè), ,用來引導(dǎo)條件狀語從句用來引導(dǎo)條件狀語從句, ,因主因主 句為祈使句句為祈使句, ,其動作為未來的動作其動作為未來的動作, ,所以空白處用普通如今時表示未來。所以空白處用普通如今時表示未來。3.3.動詞不定式作后置定語修飾名詞動詞不定式作后置定語修飾名詞timetime。1.Li Lei gave me some1.Li Lei gave me some (advise) on my pronunciation. (advise) on my pronunciation.2.Celia,join us in the Super Summer Camp if it 2.Celia,