1.万能的用法是：Yours sincerely, 或 Sincerely yours, 最方便，什么信件都适用哦。

2.私人信件中可以用：Best wishes, Best regards, Best, Regards, Warmesr regards, Yours ever, Yours, Cordially

3.一些很亲密的亲人或者朋友可以用：Affectionately, Yours affectionately, Love, Lovely, Cheers, Your devoted friend, Your loving father (mother, son......)

4.公务信件的话，一般可以用：Yours faithfully, Yours trully, Yours respectfully, Yours gratefully, Yours cordially

如果是公务的正式信件中，给团体或者不知名的人写信，还可以用：Trully yours, Faithfully yours