帮忙翻译几句英文

Question

请原谅我没有及时回信．
由于我的英语水平不够高，因此上次的信你看不懂．

Answer 1

I'm sorry that I did not reply in time.
Unfortunately, you do not understand my last letter since my English is not good enough.
注：第一句里，英语中一般不说请原谅我怎么怎么样，而是说“请原谅我没有及时回信”，因此我翻的是“I'm sorry that …”第二句开头我加上了unfortunately(不幸的是），这样比较礼貌~

Answer 2

Please forgive me if I did not reply in time.
Since my English is not high enough, so you can see the last of the letter do not understand.

Answer 3

please excuse me for not replying sooner.
since i'm not good at english, you weren't able to understand my last letter/mail.