Unit4Grammar课件牛津译林版英语八年级上册

Unit4DoityourselfGrammar类型结构例句Do型行为动词原形+其他Standup,please!请起立！Be型Be+形容词/名词+其他Becareful,please.

请认真一些。Let型Let+宾语+动词原形Letmehelpyou.让我来帮助你吧。肯定结构祈使句结构2.

否定的祈使句（1）

Don't

+

动词原形

Don't

stand

up.

别站起来。

Don't

be

careless.

别粗心。

Don't

let

them

play

with

fire.

别让他们玩火。

（2）Let's

(

let

sb

)

+

not

+

动词原形

Let's

not

say

anything

about

it.

对于这件事，咱们什么也别说。

Let

them

not

play

with

fire.

别让他们玩火。否定结构结构例句Don’t+动词原形Don’tbelate.别迟到。Don't

stand

up.

别站起来。Let’s+not+动词原形Let’snotsayanythingaboutit.对于这件事，咱们什么也不要说。Don’tlet+第三人称宾格+动词原形Don’tletthemplaywithfire.别让他们玩火。祈使句的回答祈使句通常表示将来要发生的动作，所以回答时，一般用will或won’t。—Don’tforgettodoyourhomework.—Iwon’t.—Remembertoturnoffthelights.—Iwill.祈使句的反义疑问句Let’s…,shallwe?Letus.…,

willyou?肯定祈使句，will常用/won’tyou?否定祈使句，willyou?Let’sgo,Lettheboygofirst,Don’tsmokehere,shallwe?willyou?willyou?在公共场合的提示语中，常用的结构“No＋名词/v-ing”，表示“禁止做某事”Nosmoking!Nophotos!Noparking!InstructionsatschoolDon’tstamponthegrass.Don’tdroplitter.Listencarefullyinclass.Beactive!Don’tletyourmindwander.Let’sworkhard.InstructionsinthelibraryBequiet.keepsilence.Nosmoking.Don’teatordrink.InstructionsinthestreetTurnleft.Turnright.Walkonthezebracrossing.Don’tcrossthrougharedlight.Howtomakecards?Millieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.cutdrawwritegivekeeplooktry_____outpiecesofcardwithapairofscissors._____somewordsorasentenceoneachcard.CutWritecutdrawwritegivekeeplooktry_____apictureaboutthewordsorsentenceontheothersideofthecard._____atthepictureand___torememberwhatisontheotherside.DrawLooktry1.Lucy

herhomeworkbyherself.(do)2.Lucy,

yourhomeworkbyyourself.(do)3.Lucy,______yourhomeworkbyyourselfisimportant.(do)doesdodoing4.________theapplesandeatthem.(pick)5.________theapples

isgreatfun.(pick)6.________everydaymakesyousmart.(read)7.________thebooksandanswerthequestions.(read)PickPickingReadingRead区分祈使句和动名词作主语GrammarBshouldandhadbetterThestructuresofshould/hadbetter:肯定形式：should+dosth.否定形式：shouldnot(shouldn’t)+dosth.肯定形式：hadbetter(’dbetter)+do

sth.否定形式：hadbetter(’dbetter)

not+do

sth.UsingshouldandhadbetterSuzydoesn’tthinkhercousinknowsmuchaboutDIY.Whatdidsheadvisehimtodo?Whatdoyouthinkshesaidtohimaboutthis?GiveDIYadviceMakesentenceswithshould(not)orhadbetter(not)togiveDIYadvice.1.Willyoupleasereaditagainmoreslowly?(改为祈使句)

_______againmoreslowly,please.

2.Ifyoudon'tlistentome,I'llgo.(改为同义句)

________me,orI'llgo.

3.Theteachersoftentellthestudentsnottobecareless.

(改为祈使句)

________careless,please.

4.PleasesitnexttoNancy.

(改为否定句)

________nexttoNancy.Readit

Listento

Don'tbe

Don'tsitPractice1.你应该在南京换火车。

__________changetrainsatNanjing.2.你最好在下雨前回家。

___________________beforetherainstarts.3