Unit4Donteatinclass.,語法精講,基礎(chǔ)自測,閱讀提升,第2課時(shí)SectionA(GrammarFocus3c),一、祈使句1含義：祈使句是用來表示請求、命令或建議等的一種句型。其主語一般為第二人稱you，但通常省略。祈使句的句末一般用句號，表示較強(qiáng)語氣時(shí)用感嘆號。為了使祈使句顯得更委婉、有禮貌，可在開頭或結(jié)尾加上please。,2祈使句的五種類型,3.祈使句的否定形式通常是在謂語動詞前加dont。但要注意以let開頭的祈使句，其否定形式是“Dontlet賓語動詞原形其他”或“Let賓語not動詞原形其他”。4對祈使句的基本回答：(1)A：Tom,taketheboxtoMr.Wusoffice.B：肯定回答Yes,Iwill.否定回答Sorry,Icantcarryit.(2)A：Dontlistentomusicinclass.B：No,Iwont.(用于自己之前沒做過，同時(shí)也表明自己今后也不會做時(shí))或Sorry,Iwontdoitinfuture.(用于自己犯錯(cuò)，被別人禁止時(shí)),(3)A：Letsgooutforawalk.(“Letsdosth.”常用于提出建議)B：肯定回答Thatsagoodidea.或Thatsoundsgood.(直接表示贊同)否定回答Oh,no.Itstoohot.或Oh,no.LetswatchTVathome.(可用“No”作否定回答，并適當(dāng)解釋或提出自己的見解)祈使句一般要對方去做的動作是在將來發(fā)生?？隙ɑ卮饡r(shí)常用“Yes,Iwill”；否定回答時(shí)常用“No,Iwont”等。will為“將要”之意，wont為will和not的縮寫形式，為“將不；將不會”之意。,二、情態(tài)動詞can與haveto1can能；會(1)表示做某事的能力，其否定式為cant。如：CanyouspeakEnglish?你會講英語嗎？(2)表示“允許；許可”。如：Youcankeepthebookforaweek.這本書你可以借一周。2haveto必須；不得不其后接動詞原形。haveto有第三人稱單數(shù)形式，即hasto，變疑問句和否定句時(shí)要借用助動詞do/does。如：Wehavetogohomeafterschool.我們放學(xué)后必須回家。,.用括號內(nèi)所給單詞的適當(dāng)形式填空。1_(notplay)withfire(火)2Dont_(run)intheclassroom.3Lethimnot_(notplay)thecomputergames.4Canwe_(eat)here?5Doyouhaveto_(go)tobedbeforetenatnight?,Dontplay,run,notplay,eat,go,.根據(jù)漢語意思完成句子，每空一詞。1到這兒來。_2別在走廊里跑。_inthehallways.3快點(diǎn)！_！4不要在這兒吃東西。_here.5讓我們騎自行車到那兒吧。_thebiketogetthere.,Come,Dont,Be,Dont,Lets,here,run,quick,eat,ride,.按要求完成下列句子，每空一詞。1Lilycanplaytheguitar.(改為一般疑問句并作否定回答)_Lily_theguitar?No,she_2Jackhastoplaythepianoeveryweekend.(改為一般疑問句)_Jack_playthepianoeveryweekend?3Bequick.(改為否定句)_quick.4Youcanteatfoodinclass.(改為祈使句)_foodinclass.5Youcantbelateforclassnexttime.(改為祈使句)_lateforclassnexttime.,Can,Play,cant,Does,have,Dont,Dont,Dont,to,be,eat,be,.單項(xiàng)選擇。()1._listentomusicintheclassroom.ANotBNoCDontDDoesnt()2.Tom，please_theclassroomnow.AcleanBtocleanCcleansDcleaning()3.Lets_ontimeforclasses.AbeBbenotCareDis,C,A,A,B,()4.Shehasto_herhomeworkeverynight.AdoesBdoCdoingDdid()5.Sorry，you_playbasketballintheclassroom.AcantBdontCdonthavetoDdoesnt,A,DearSam，Herearesome_1_foryouwhenyourdadandIarenotathome._2_，gethomeearly.Dontplay_3_afterschool.Second，takecareof(照顧)yourbrotheranddont_4_withhim.Third,helpyourgrandmadothe_5_afterdinner.,fightdirtydishrulebeforefollowoutsidekeeponepractice,.選詞填空。閱讀短文，從方框中選擇適當(dāng)?shù)脑~并用其正確形式填空，使短文通順、意思完整。每詞限用一次。,Fourth，rememberto_6_thepianoforonehoureveryevening.Fifth，gotobed_7_10oclock.Thelastone,_8_yourroomcleananddontleaveyour_9_clotheseverywhere.YourdadandIwillbeveryhappyifyoucan_10_therules.1_2_3_4_5_6_7_8_9_10_,rules,First,outside,fight,dishes,practice,before,keep,dirty,follow,