遺憾用英語怎麼寫

　　你不能再多停留些時間，真是遺憾。

　　It's a pity that you can't stay longer.

　　我很遺憾，他不接受那項工作。

　　He didn't accept the job, I'm sorry to say.

　　我只能遺憾地告訴你，你不及格。

　　I'm sorry to have to tell you you've failed.

　　我很遺憾美國也附和了這樣的抗議。

　　I regret that the United States has added its voice to such protests.