unit4重點(diǎn)語法講解

1.Usedtodosth：過去（常常）做某事否定句Hedidn’tusetohaveshorthair.Heusedn’ttohaveshorthair.Eg:heusedtohaveshorthair.他過去常常短發(fā)Usednotusedn’t縮寫反意疑問句heusedtohaveshorthair,didn’the?一般疑問句Didheusetohaveshorthair?

yes,hedid./No,hedidn’t.Usedhetohaveshorthair?

Yes,heused./No,heusedn’t.heusedtohaveshorthair,usedn’the?2.①Usedtodosth：過去（常常）做某事Eg:HissisterusedtogoskatingonFridays.②beusedtodoingsth

習(xí)慣于做某事Eg:Iamalreadyusedtogoingtobedearly.

我已經(jīng)習(xí)慣早睡了。③beusedtodosth被用于做某事Eg:woodisusedtomakepaper.

木材被用來造紙。④beusedfordoingsth被用于做某事（強(qiáng)調(diào)工具的用途）Eg:theknivesareusedforcuttingthings.

小刀被用來切東西。3.So和such的用法：Such+

a/an+形容詞+可數(shù)名詞單數(shù)＝so+

形容詞+a/an+可數(shù)名詞單數(shù)Eg:thispartyissuchagreatidea.thispartyissogreataidea.4.Ithasbeen+時(shí)間段+since+從句（一般過去時(shí)）

自從……以來已經(jīng)有多長時(shí)間了。Eg:IthasbeenthreeyearssinceIleftprimaryschool.

自從我小學(xué)畢業(yè)已經(jīng)三年了。

6.advise(v)-------advice(n)不可數(shù)名詞advisesbtodosth建議某人做某事advisesbnottodosth建議某人不要做某事advisedoingsth建議做某事7.①takeup意為“開始做，從事”

takeupdoingsth開始做某事。②takeup意為“占據(jù)（空間），占用（時(shí)間）”

Eg:Iwilltakeupyourtime.

我將會(huì)占用你的時(shí)間差8.not…..anymore不再①not…..anymore＝nomoreSheisnotshyanymore.(同義句）Sheisshynomore.NomoreSheisshy.Nomore可放在句首，也可放在句尾Nomore可放在句首，也可放在句尾②not…..anymore與not…….anylonger的區(qū)別not…anymore＝nomore表示次數(shù)不再重復(fù),not...anylonger＝nolonger表示時(shí)間不再延續(xù)Nolonger位于句首時(shí)，句子需倒裝。Nolongerdidhelivehere。他已經(jīng)不在這里住了。9.becarefulabout當(dāng)心…..,小心……,注意……becarefulabout+名詞/代詞/動(dòng)名詞/從句becarefulabout(what...)

eg.becarefulaboutwhatyouaredoing.becarefultodosth小心做某事becarefulnottodosth小心不要做某事10.anumberof與thenumberof的區(qū)別①anumberof許多，大量的

anumberof+名詞復(fù)數(shù)

做主語，謂語動(dòng)詞用復(fù)數(shù)形式。②

thenumberof

…..的數(shù)量thenumberof+名詞復(fù)數(shù)做主語，謂語動(dòng)詞用單數(shù)形式Thenumberofvisitorsis10millionAnumberofvisitorsgototheGreatwalleveryyear.11.dealwith和dowith的區(qū)別。①兩者都表示“處理”。dealwith側(cè)重于方式，方法。dowith側(cè)重于對(duì)象。②在特殊疑問句中，搭配的疑問詞不同。What…..dowith……………..?How………dealwith…………..?Idon’tknowhowtheydealwiththeproblem.(同義句）Idon’tknowwhattheydowiththeproblem.12.Worryabout=beworriedabout

為……..擔(dān)心13.bepreparedtodosth準(zhǔn)備好做某事

bepreparedfor……為….做好準(zhǔn)備

14.giveup的用法①giveupdoingsth放棄做某事②giveup動(dòng)副短語，代詞放在中間giveitup,givehimup15.tonsof許多，大量①tonsof+可數(shù)名詞復(fù)數(shù)/不可數(shù)名詞②tonsof＝lotsof=alotof11.takecareof=lookafter照顧Takegoodcareof=lookafter…well好好照顧12.makeadecision意為作出決定，下決心makeadecisiontodosth=decidetodosth

決定做某事16.proud(adj)---------pride(n)①beproudof=takepridein為…..而驕傲①beproudtodosth為做某事感到驕傲17.Lonely和alone用法：①alone表示“獨(dú)自一人”，強(qiáng)調(diào)客觀情況。Sheoftenstaysathomealone.②lonely表示精神上“孤獨(dú)，孤單”。Heoftenfeellonelyandunhappy.18.decide的用法①decide(v)決定，決心decidetodosth決定做某事②decide(v)----decision(n)決定，決心makeadecision下決心，作決定makeadecisiontodosth決心做某事makeadecisiontodosth＝decidetodosth19.advise的用法①advise(v)----advice(n)不可數(shù)名詞Apieceofadvice一條建議

givesbsomeadvice給某人提建議Follow/takeone’sadvice接受某人的建議②advise(v)的用法advisedoingsth建議做某事advisesbtodosth建議某人做某事advisesbnottodosth建議某人做某事20.Eventhough的用法

①Eventhough＝evenif縱然，盡管，雖然

②Eventhough不能與but連用。21.