Am I allowed to 我可以……吗2
As matter of fact 实际上……3
As far as I'm concerned 就我而言4
As far as I know 据我所知5
As I just mentioned 正如我刚才提到过的6
As I see it 在我看来7
As is known to us all 众所周知,……8
As long as 只要…9
But for
若不是因为；如果没有……10
Can you believe (that) 你相信……吗11
Can you imagine 你能想象……吗12
Could you please explain 你能解释一下……吗13
Can't we
难道我们不能……吗14
Could you do me a favor and
能否请你帮我一个忙…15
Do you by any chance know
你(碰巧)知道……吗16
Do you enjoy doing
你喜欢做……吗17
Do you happen to know
你(碰巧)知道……吗18
Do you have any good ways to
你有没有……的好办法19
Did you know (that)
你知道……吗20
Do you know if (whether)
你知道是否……21
Do (Would) you mind doing
你介意做……吗22
Do (Would) you mind if
如果……你是否介意23
Do you realize (that)
你有没有意识到……24
Do you think it is possible to
