yes they may have done 为什么不能用can
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yestheymayhavedone为什么不能用canyestheymayhavedone为什么不能用canyestheymayhavedone为什么不能用cancanhavedone通常只用于疑问句
yes they may have done 为什么不能用can
yes they may have done 为什么不能用can
yes they may have done 为什么不能用can
can have done 通常只用于疑问句和否定句;用于疑问句时表怀疑,用于否定句时表不确定.
例如:
Can they have left so soon?
难道他们这么快就走了?(表怀疑)
He can’t have been to that town.
他不可能去过那座城市.(表不确定)
这是对过去的推测
表推测的情态动词有三类 can\could一类,may\might一类,must一类,
记住一个口诀:can不肯,may不问,must肯定不否问,
意思是
can\could不能用于肯定句,
may\migh不能用于疑问句
must 只能用于肯定句
yes they may have done 为什么不能用can
Do they have a tennis racket?选择 A Yes,they are.B Yes,they do.
Do Alan and his classmate have chairs?--Yes,_.A they have B they do
YES,THEY DO
Yes,they do
( )tomatoes yes,they have
do they have a computer?为什么用Yes,they do 回答
Do they have a lot of milk 的肯定回答是YES they do吗
Do Barry and Peter have a baseball? Yes,----------.A、they are B、they do C、they have D、he does
Do you have _____CDs here?---Yes,they are over there.May I borrow ____?---Yes,of course.A.some,some B.any,any C.any,little D.some,any为什么
()they have any collectinns?yes,they() .1.are,are 2.do,do 3.can,do 4.do,can
Do you think computers have good memory?怎么回答肯定回答是yes,I do .还是yes,they do
Do they ____any flowers?yes,they do
-Yes,They do.They also have black and white.-I want to buy a bag___sports too.
( ) l do have to show the school report to my parents,miss king?yes,you do.do may does can
Do English people often have tea?英国人喝茶的吗?为什么答案是Yes,they do.
Lucy and Lily have long hair.Am i right?A.Yes,they are.B.Yes ,they do.C,yes they does.
____ I have to finish the picture today.回答yes,you do.用must,can,may还是do