真的很抱歉，由于上次课我记错时间了，所以没有来上课，我的英语口语不好，希望老师谅解，我叫尹大伟

I'm a information management and information system major,my name is David. And I'm really sorry about my absence last class because I misremembered the class schedule.
没上课而已不用说自己口语不好或者让老师原谅吧。。道个歉就行了。

My name is Dawei Yi. I'm very sorry for being absent from the last class, because I got the wrong time for the lesson. My oral English is poor. I hope my teacher will forgive me.

I am so sorry. Because i misremembered the class schedule, i didn't came to class. I don't speak english every well. I hope that Ms. XX can forgive me. i am XXX