Am I allowed to 我可以……吗As matter of fact 实际上……As far as I'm concerned 就我而言As far as I know 据我所知As I just mentioned 正如我刚才提到过的As I see it 在我看来As is known to us all 众所周知,……As long as 只要…But for
若不是因为;如果没有……Can you believe (that) 你相信……吗Can you imagine 你能想像……吗Could you please explain 你能解释一下……吗Can't we
难道我们不能……吗Could you do me a favor and
能否请你帮我一个忙…Do you by any chance know
你(碰巧)知道……吗Do you enjoy doing
你喜欢做……吗Do you happen to know
你(碰巧)知道……吗Do you have any good ways to
你有没有……的好办法Did you know (that)
你知道……吗Do you know if (whether)
你知道是否……Do (Would) you mind doing
你介意做……吗Do (Would) you mind if
如果……你是否介意Do you realize (that)
你有没有意识到……Do you think it is possible to
你认为……可能吗Do you think it necessary to
你认为有必要……吗doesn't make sense 没有道理/没有意义/不清楚Don
