微课制作（情态动词can的用法）.ppt

Modal verbs
can and cannot
We use can and cannot (can't) to say we are able or unable to do something.
用法
① be able to 能，能力
. 我可以唱一首英语歌曲。
I can/am able to sing an English song.
② 过去式：could
. 我十年前就能做到那样。
I could do that 10 years ago.
③ 否定式： cannot = can’t
④ 情态动词can +
结构
①肯定→Sb + can + + 其它.
eg: Peter can speak English.
②否定→Sb + cannot/can’t + + 其它.
eg: Peter can’t/cannot speak English.
③一般疑问句→Can + Sb + + 其它 +?
eg: Can Peter speak English?
④特殊疑问句→特殊疑问词+can+Sb++?
eg: What can Peter speak?
( ) 1.---- ____ you help me with this Maths problem?
---- I ____ not work it out.
A. Can; may B. Must; must
C. Can; can D. May; may
( ) 2. The boy ____