GrammarModalverbs情态动词(I)-_______I……
-Yes,you_____
/No,you_______一、表请求的情态动词-May……
-Yes,youmay
/No,you_______/hadbetternot
Can/CouldCouldcancan't
may\mightmustn’tShallIopenthewindowforyou
Shallhefetchsomewaterforyou
Yes,please
\No,youneedn’t
shall在疑问句中,用于一、三人称,用来表示请求或征求意见
—______Igohomenow,sir
—No,you____
Youshouldfinishtheworkfirst
Might;wouldn’tB
May;hadbetternotC
Must;mustn’tD
Need;mustn’t2
—CouldIuseyourbike
—Yes,surelyyou______
mightB
should3
—______heuseyourbike
—Certainly
Hereisthekey
ShallB
DoesBCA二、表猜测的情态动词must表猜测,用于肯定句中can表猜测,常用于否定、疑问句中can’t不可能maynot可能不mustn’t可不能;禁止;不允许进行式:must/should/can/could/may/mightbedoingsth
(对正在进行的动作的猜测)一般式:must/should/can/could/may/mightdosth
(对一般情况的猜测)•Hurryup
Theymustbewaitingforusattheschoolgate
•Someoneis