Hi,
I'm sorry to tell you that you have many, many errors. I'll try to correct them, but in some cases I don't understand what you mean.
1. Never stop improving your English.
2. Supposedly, some of you guys, perhaps quite a few till now, were wondering why I haven't shown my face of late. To be straight to the point, I've been busy studying english. Anyway, I left a few casual words here as errors.
3. To get to the point, why don't you demonstrate your superior grammatical skill in English?
4. There is a gap between your skill and authentic English. Consequently, the further beyond your understanding you felt it, the wider and deeper the gap really was.
5. I can't stop laughing for no reason.
Best wishes, Clive
[I tried to fix the formatting, Clive.-- MM]