It is Can you please stop
No.I'm assuming you're asking if that's the correct grammar, and it's not. The correct phrase would be "May I please go?".
"So few" is correct for things that may be counted.
Either is correct. Please, may I have some more? May I have some more, please?
The issue is not grammar, but pronunciation. In words beginning with h but not stressed on the first syllable the h may be silent.
Yes. But it is a question not a statement. Also i should be capital 'I'. May I have your name please?
No.I'm assuming you're asking if that's the correct grammar, and it's not. The correct phrase would be "May I please go?".
Yes
"So few" is correct for things that may be counted.
For more than 20 years of existence this may be my first time to visit here is not correct grammar.
Either is correct. Please, may I have some more? May I have some more, please?
Although "in a train" may seem correct, the more commonly used phrase is "on a train".
Both are correct and may have different meaning, according to context.
May I is the correct form for seeking permission.
As the subject of a verb, yes. Otherwise use Joe and me. We say "Joe or I will answer your questions: you may ask Joe or me."
He was born in Essex. You may want to improve your grammar. As "were" is not correct. Where would be correct as it involves a place.
No. With things that may be counted we use "fewer."
The issue is not grammar, but pronunciation. In words beginning with h but not stressed on the first syllable the h may be silent.