Unit4UnderstandingideasGrammar课件人教版英语七年级下册

TheartofhavingfunUnit4Understandingideas—GrammarLearningObjectives1.learnimperativesandfindouttherules.2.dosomeexercisestouseimperativesflexibly.3.useimperativesinrealcontexts.Inthislesson,wewill:什么是祈使句？祈:祈求使:使得祈求一个人使得他去做一件事，或者不做一件事的句子就是祈使句。祈使句用来表达叮嘱、希望、命令、请求、劝告、警告、禁止等。祈使句一般没有主语，说话的对象都是第二人称“你”或“你们”，所以也可以理解为省略了主语you。祈使句以动词原形开头、无时态和数的变化。句末可以用感叹号来表达比较强烈的语气，也可以用句点结尾。祈使句的肯定形式：祈使句的句型结构1.Do型：（动词原形+其他成分）e.g.Listentome!2.Be型：（Be+形容词/名词+其他成分）e.g.Beapolitestudent!3.Let型：（Let+宾语+动词原形+其他）e.g.Letmehelphim!祈使句的否定形式：祈使句的句型结构1.Do型：（Don’t+动词原形+其他成分）e.g.Don’truninthelibrary!2.Be型：（Don’t+be+形容词/名词+其他成分）e.g.Don’tbelateforclass!祈使句的否定形式：祈使句的句型结构3.Let型两种：（Don’tlet+宾语+动词原形+其他/Let+宾语+not+动词原形+其他）e.g.Don’tlethimrun.=Lethimnotrun.4.No型：表示禁止（No+动名词/名词）e.g.Nosmoking.5Readthesentencesfromthereadingpassageandsummarise

the

grammarrules.(a)Imaginestayingonanislandalone.(b)Don'tforgettotakesometimeouttohavefunandenjoylife!Nowfindmoresentenceswiththesestructuresinthereadingpassage.6Completetheinstructionswiththeverbsinbrackets.Usedon't

appropriately.1.___________(worry)aboutwinning—justenjoyyourselfinsports.2.______(try)toputfunintoyourdailylife,likelisteningtomusic

whiledoinghousework.3.________(read)thispassagetofindwhyweshouldhavefun.Don’tworryTryReadShareExploreMakeDon’tmissoutcallJoinEnjoydoingawaywithbadfeelings

keepingusfeelingyouthful

liftingourspiritsUsefulexpressions.Funcan...

.Havingfunisagoodwayto....Funalso...

.Rememberthat....Researchshowsthatfun...

.Don'tforget...Teamwork,communication,andpersonalgrowth.一、单项选择1.“Bequiet!”属于祈使句的哪种类型？（

）

A.Do型

B.Be型

C.Let型

D.No型2.“Don'ttalkinclass.”属于祈使句的哪种否定形式？（

）

A.Do型

B.Be型

C.Let型

D.No型3.“Let'sgotothepark.”的否定形式是（

）。

A.Let'snotgotothepark.

B.Notlet'sgotothepark.

C.Don'tletusgotothepark.

D.Notgoingtothepark.BAA二、句型转换1.Lethimplaybasketball.[改为否定句(两种形式）]2.Beagoodboy.（改为否定句）3.Doyourhomework.（改为否定句）Don'tlethimplaybasketball./Lethimnotp