Informal letter - accepting an invitation

Dear John,
Thanks for your letter.It was great to hear from you. I’m sorry I haven’t written for months, but I had some personal problems. It’s really good news that you’ve passed your last exam. Congratulations!
Thank you so much for your invitation to stay with you for week in July.I’d love to come. I know that you have a wonderful beach near your house, and I’d really enjoy spending some time there. I expect what the weather will be hot, so I hope we can go swimming.
You said that I don’t need to bring much with me. What sort of clothes should I pack? Casual or formal? Would you like me to bring anything for you? I would like to bring something special for you and your family.
I’d better stop now and get on with my studying. I’m looking forward to seeing you in July and ahead to having a great time.
Thanks again for the invitation.
All the best, Michael

If you can, please correct it/give me some ideas/change some expressions.

Thank you very much.

Hi D.Alex,

Your letter is well-written, and doesn’t require much in the way of corrections at all. :slight_smile:
There are just a few minor errors, including one or two that are possibly typos rather than grammatical mistakes:
…to stay with you for a week in July
I expect that the weather
I’m looking forward to seeing you in July and looking ahead to having a great time. <-- I understand that you left ‘looking’ out before ‘ahead’ because you were trying to combine it with ‘looking forward’ but it doesn’t really work well here, so you need to add it. Of course, this leaves you with the problem of having the word ‘looking’ appearing twice in a short space. I don’t think that it matters here, but if it bothers you, then you will have to reword the sentence. Here’s one possibility:
I’m looking forward to seeing you in July and I am certain that we will have a great time.

I really appreciate your help, I don’t know how to thank you. :slight_smile:
And sorry if my english isn’t perfect.

It’s a pleasure to help.
There’s absolutely no need to apologise for imperfect English. I’ve been immersed in it all my life and mine isn’t perfect either!
I don’t know what your native language is, but I guarantee that your command of English is better than my command of your mother tongue.