I wish I could, but... 虽然很希望，但……

　　I wish I could, but I can't. I have too much work to do. 我也很想，不过不行。我还有很多事情要做。

　　I wish I could come, but I'm busy on Friday. 我也想去，不过我星期五有点忙。

　　I'd like to, but I have to go right now. 我也很想，不过我现在得走了。

　　I'd love to, but I have to go home early tonight. 我也很想，不过我今天晚上得早点回家。

　　Come on over to my house on Sunday afternoon. 星期天下午来我家玩吧。

　　I wish I could, but I have other plans. 我也很想，不过我已经有别的安排了。