3. "I'd love to do this, but …"
3. “我是愿意做這事,但是……”
It's a gentle way of breaking no to the other party. It's encouraging as it lets the person know you like the idea (of course, only say this if you do like it) and there's nothing wrong about it.
這是一種委婉拒絕他人的方式。這句話比較鼓舞人心,因為它讓對方知道你愿意做這事(當然,只有當你真的愿意的時候才請這樣說),并且他/她的請求本身沒有什么不對。