九年级英语9AUnit5 Grammar学案教案及反思

教案系列九年级英语9AUnit5Grammar学案教案及反思九班级英语9AUnit5Grammar学案

1.should和oughtto与must区分

用should/oughtto可以表示“劝说“或“督促“,和must一样,但三者语气强弱不同。

用should语气比较确定一些,说话人的主观信念要剧烈一些。含有责任的意思。

用oughtto则口气上不那么坚决。

用must则在口气上最剧烈,含有责任的意思。例如:

Youmustdoyourhomework.Youshouldspeaktoyourparentspolitely..

Ioughttowritetohimtoday.

2.must与haveto

must表示“必需“,侧重于说话人的主观意志。

haveto表示“必需“,侧重于客观的需要,含有“不得不“的意味。

3.hadbetter(常缩写为”dbetter),是一固定词组,表示“最好“,用于表示对别人的劝说、建议或表示一种愿望。

hadbetter后面加动词原形,即hadbetterdosth.不论主语是第几人称,句子无论是何种时态,hadbetter形式不变。hadbetter的否定形式为hadbetternotdosth表示“最好不要做……“。如:You”dbetternotmissthelastbus.

You”dbetternotplayontheroad.It”sdangerous.

You”dbetterputonthecoat.It”scoldoutside.

4.Whynot…?/Whydon”tyou…?

这两种句型结构常用于说话人向对方提出一个建议,意思是“不……?“;“为什么不……?“

Whynot…?/Whydon”tyou…?后面必需跟动词原形。如:

Whynotgoswimming?=Whydon”tyougoswimming?

Whydon”tyougooutforawalk?=Whynotgooutforawalk?

练习:

一单项选择

1.Mymotherwasill.I______stayathometolookafterher.A.mustB.havetoC.couldD.can

2.____goshoppingwithyourfather?That”sagoodidea.A.Whydon”tB.WhynotC.DoD.Does

3.You___giveupsmoking.

A.wouldbetterB.hadbetterC.wouldbettertoD.hadbetterto

4.Whydon”tyou_____climbingwithustomorrow?A.togoB.goingC.goD.goes

5.Cars,busesandbikes___stopwhenthetrafficlightschangestored.

A.canB.mayC.mustD.need

6.It”stoohot.Perhapsyou______swimmingthisafternoon.A.mustgoB.shouldgoC.maygoD.cango

7.Tomakeourhometownmorebeautiful,you__throwrubbishintotheriver.A.needn”tB.mustn”tC.mustD.need

8.Howinterestingthenewsis!Why_____joinus?A.won”tB.noC.don”tD.not

二、履行句子

1.Youlooksotired.____________(你最好不要学习得太晚).

2.We____________(我们应当每天保持教室洁净和洁净).

3.___________(或许我们可以向朱老师求助).Heiskindandhelpful.

4.___________(你为什么不出去啊?)Youshouldnotstudyallthetime.

5.___________(你得保持宁静)whilereadinginthelibrary.

三、分别用should,oughtto,hadbetter,haveto和must履行句子

1.Washyourhandsbeforedinner.

2.Makeawishwhenyoublowoutthecandlesonabirthdaycake.

3.Drinkcoldwatertakendirectlyfromthefridge.

4.Keepthetableclean.

5.Eatvegetablesevenifyoudonotlikethem.

四、用whynot和,whydon”tyou分别履行下列各句。

1.Goshoppingwithme.

2.Askyou