：
Dear Mr.Smith,
How are you these days? I’m writing to tell you about a change in your oral class on Tuesday afternoon. A basketball match is being held in our school at that time. The match between our class and Class Three will be held at 3p.m. on Tuesday, the time when we usually have our English oral class. I’m sorry for the change in time. Would it be convenient for you to give the oral class at three on Wednesday instead? You are welcome to come and watch our match on the playground on Tuesday afternoon if you are free. We’d all be very glad to see you there.
I must apologise again on behalf of the whole class.
Yours,
Li Hua

：本文是应用文中常见的书信。是向外教说明改变上课的时间。在本文中首先要注意书信的格式，其次要注意务必要说明原因，和改了以后的日期。要点要全，不要有任何的遗漏。在写作时要使用合适的连接词让文章更通顺，更像一个整体。也要使用较高级的词汇，如convenient等，使文章更有文采，更有档次。

：
Dear Mr.Smith,
How are you these days? I’m writing to tell you about a change in your oral class on Tuesday afternoon. A basketball match is being held in our school at that time. The match between our class and Class Three will be held at 3p.m. on Tuesday, the time when we usually have our English oral class. I’m sorry for the change in time. Would it be convenient for you to give the oral class at three on Wednesday instead? You are welcome to come and watch our match on the playground on Tuesday afternoon if you are free. We’d all be very glad to see you there.
I must apologise again on behalf of the whole class.
Yours,
Li Hua

：本文是应用文中常见的书信。是向外教说明改变上课的时间。在本文中首先要注意书信的格式，其次要注意务必要说明原因，和改了以后的日期。要点要全，不要有任何的遗漏。在写作时要使用合适的连接词让文章更通顺，更像一个整体。也要使用较高级的词汇，如convenient等，使文章更有文采，更有档次。