八上Unit4-Grammar

1、8A Unit 4 Do it yourselfGrammarImperative sentence(祈使句祈使句) -用于表示向?qū)Ψ教岢稣埱蟆⒚?、勸告等用于表示向?qū)Ψ教岢稣埱?、命令、勸告等v祈使句的肯定形式：祈使句的肯定形式： - “動詞原形動詞原形”開頭開頭(主語主語you)通常被省略通常被省略. 例：例：Please fix the shelf for me (為我修理架子為我修理架子), please. Put up (張貼張貼) a picture on the wall, please. Paint the walls blue. (將墻壁涂成藍(lán)色將墻壁涂成藍(lán)色)v祈使句的否定形

2、式祈使句的否定形式 - “Dont + 動詞原形動詞原形” 開頭開頭 例：例：Dont paint the cat. Dont waste your money like that. Dont touch the wet paint, please.vFinish exercises on P47.How to make cards1._ out pieces of card with a pair of scissors.2._ some words or a sentence on each card.3._ a picture about the words or sentence on

3、 the other side of the card.4._ at the picture and _ to say what is on the other side.5.Please_ up. _ trying and you will find you can remember things better.CutWriteDrawLooktrydont giveKeepvYou have got a cold(感冒了感冒了). You should go to see the doctor. You had better go to see the doctor.should 情態(tài)動詞

4、情態(tài)動詞用于表達(dá)用于表達(dá)“建議、或職責(zé)建議、或職責(zé)”，意為，意為“應(yīng)該應(yīng)該”。意思與意思與had better 相近，但語氣比相近，但語氣比had better 弱一些。弱一些。v陳述句：陳述句：should + 動詞原形動詞原形 例：例：We should do exercise every day.v疑問句：疑問句：should 提前提前 例：例：-Should you do exercise every day? -Yes, we should. / No, we shouldnt.v否定句：否定句：should not / shouldnt + 動詞原型動詞原型 例：例：We shou

5、ldnt do exercise every day.had better 情態(tài)動詞情態(tài)動詞表示一種建議和勸告，意思是表示一種建議和勸告，意思是“最好最好”、“還是還是好好”。v人稱和數(shù)的形式：人稱和數(shù)的形式： had better中中had無人稱、數(shù)和時態(tài)的變化。無人稱、數(shù)和時態(tài)的變化。v縮寫形式：縮寫形式： had better可以與作主語的人稱代詞縮寫?？梢耘c作主語的人稱代詞縮寫。 如：如：Id better，Youd better等。等。v肯定句形式肯定句形式：“主語主語+had better+動詞原形動詞原形+” 例：例：Its raining outside. Youd bette

6、r bring your raincoat 外面在下雨，你最好穿上雨衣外面在下雨，你最好穿上雨衣。v否定句形式：否定句形式：“主語主語+had better not+動詞原形動詞原形+” 例：例： You had better not wake me up before 6 a.m. 六點(diǎn)鐘之前你最好不要叫醒我。六點(diǎn)鐘之前你最好不要叫醒我。v一般疑問句形式一般疑問句形式: Had +主語主語+ better+動詞原形動詞原形 +？ 例：例：-Had we better leave early ? 我們是不是最好早些離開？我們是不是最好早些離開？ -Yes, wed better. / No, wed better not. 不，我們最好不要早離開。不，我們最好不要早離開。v特殊疑問句形式：特殊疑問句形式：“疑問詞疑問詞+had+主語主語+better+動詞動詞 原形原形+?”