Question

could you please 这是什么句型

Answer 1

could的否定形式是could
not,多缩写为couldn't,
（1）表示能力,意思是：能,会.
Could
you
speak
English
then?那时你能讲英语吗?
He
said
he
couldn't
follow
me.他说他跟不上我.
（2）表示可能性,意思是：可能.
That
big
cinema
can
seats
2,000
people.那家大电影院能坐2,000人.
He
said
he
couldn't
come.他说他不能来.
（3）提出请求、疑问或看法(could是虚拟语气,代替can,在时间上与can没有区别,只是语气比can委婉.can语气直爽、肯定).
----Could
you
let
me
have
your
passport?
----Yes,here
it
is.
（4）表示惊异、不信等情绪（用于疑问和否定句中,此时could与can用法相同,无时间上的差别,用could语气缓和,情绪要弱）.
Who
could
have
taken
them?谁会把它们拿走了呢?
She
couldn't
have
left
so
soon.她不可能这么快就走了.
（5）表示与事实相反的情况（用于虚拟语气）.
I
would
certainly
do
it
for
you
if
I
could.要是我能做得到,我一定会为你们做这事儿.
How
I
wish
I
could
go
with
you!我多么希望和你们一道去!