Unit 9 Can you come to my party語法情態(tài)動(dòng)詞課件 人教版八年級(jí)英語上冊(cè)

Unit9每日一句——中考常用諺語積累

Allthingsaredifficultbeforetheyareeasy.萬事開頭難。情態(tài)動(dòng)詞情態(tài)動(dòng)詞是表示主語情感態(tài)度的動(dòng)詞，必須和動(dòng)詞原形一起使用構(gòu)成謂語。

具有情態(tài)動(dòng)詞特征的詞組： haveto必須 usedto過去常?！? oughtto應(yīng)該 hadbetter最好…原形過去式canmaywillshalldareneedmustcouldmightwouldshoulddared=should+V原形意義(辨析)情態(tài)動(dòng)詞can/could①表能力

Icanplaythepiano.

IcouldplaythepianowhenIwas12.

②表請(qǐng)求/邀請(qǐng)—Canyoucometomyparty?

—Couldyoucometomyparty?

—Yes,Ican./No,Ican’t. ③表推測(cè)Thered

hat

can’t

be

his,

because

his

is

green.Hewon’tdothis.Itcouldbewrong. can→現(xiàn)在的能力could→過去的能力can→語氣生硬could→語氣委婉禮貌could→不確定推測(cè)注意：回答用can，不再委婉！can’t→否定推測(cè)表能力表請(qǐng)求/邀請(qǐng)表推測(cè)can：現(xiàn)在的能力could：過去的能力can：語氣生硬could：語氣委婉禮貌回答用cancan’t：否定推測(cè)could：不確定推測(cè)情態(tài)動(dòng)詞may/might①may表請(qǐng)求

MayIsithere?

回答：

Yes,youcan. No,youcan’t.

②表推測(cè)Thatmay/mightbeMr.Green,Iamnotsure.

may→語氣較委婉禮貌注意：回答用can，不再委婉！may/might→不確定推測(cè)may表請(qǐng)求語氣委婉禮貌回答用can表推測(cè)may/might：不確定推測(cè)情態(tài)動(dòng)詞will/would①表將來

Iwillgotoseeamoviewithhimtomorrow.

Iwouldn’tgotoseeamoviewithhimlasttime.

②表請(qǐng)求/建議Willyougotoseeamoviewithme?

Wouldyougotoseeamoviewithme?

will→一般將來時(shí)would→過去將來時(shí)will→語氣生硬would→語氣委婉禮貌表將來表請(qǐng)求/建議will：一般將來時(shí)would：過去將來時(shí)will：語氣生硬would：語氣委婉禮貌情態(tài)動(dòng)詞shall/should①

should表責(zé)任義務(wù)(應(yīng)該) Youshouldfinishyourhomeworkbeforehangingout.②

shall表征求意見(好不好)

Shallwegohomenow?Shalltheystart?shall表建議：好不好should表責(zé)任義務(wù)：應(yīng)該情態(tài)動(dòng)詞must①肯定形式must：

表必須Youmustgohomerightnow.—MustIgohomerightnow?—No,youneedn’t/don’t

have

to

表肯定推測(cè)

ThegreenhatmustbelongtoMr.Green,Iamsure.②否定形式mustn’t：表禁止不準(zhǔn)Youmustn’tgooutwithoutmypermission(允許).=can’t肯定形式must否定形式mustn’t表必須表肯定推測(cè)表禁止不準(zhǔn)=can’t提問時(shí)否定回答needn’tdon’t

have

toneed①實(shí)意動(dòng)詞(肯定句)needtodosthIneedtogonow.②情態(tài)動(dòng)詞(否定句/疑問句)—MustIdoit?—No,youneedn’t.實(shí)意動(dòng)詞情態(tài)動(dòng)詞肯定句否定/疑問句needtodosth+V原形意義(辨析)表推測(cè)情態(tài)動(dòng)詞表推測(cè)肯定：must

肯定… 否定：can’t

不可能… 不定：might/may/could

可能…

Hemustbehomebecausethelightison.Thatcan’tbehimbecausehewenttoParis.Hemight/may/couldbeTom.Iamnotsur