雅思写作：写邮件必备句型

　　1.We agree with you on我们同意你在

　　2.With effect from today.从今天开始生效

　　3.as you requested/per your requirement按照你的要求

　　4.As I mentioned earlier about 如我先前所提及关于

　　5.I am convinced that我确信

　　6.I would like to apologize for我想就道歉