1) about Question tag.
ex. you’ve got many friends, haven’t you?
you have many friends, don’t you?
Which one is UK or US? I always find British and American English a bit confusing.
I personally think, both are in the American English because 'have got' here is an American idiom which means 'have or own'. And the British English I want to recommend for the second sentence is "You have many friends, haven't you?".
+ In ‘ English grammar in use ‘ by Raymond Murphy says ‘ after the imperative the tag is usually........ will you?
ex. Open the door, will you?
But in “Total English” says “ we usually use ...... won’t you? “
ex. Have a seat, won’t you?
Which one is correct?
I think, both are correct. I can say "Take a seat, will you?" or "Take a seat, won't you?" Using 'will you?' and 'won't you?' differs in meanings or purposes. 'Will you? means an invitation or a request while 'won't you?" means a strong emphasis.
2) about Quantifiers.
_ do you want anything/ something to eat?
_ I’m going to try and see my aunt every/ any weekend.
_ I know you’re busy so I don’t suppose you’ve got some/ any time to help me.
Which ones are correct?
- Do you want
anything/something to eat?
(correct) (Anything and something are not quantifiers but pronounds.)
- I'm going to try and see my aunt
every weekend.- U know you're busy so I don't suppose you've got
some time to help me. (some time here means 'a considerable period of time or a lot of time' while any time doesn't convey a time period.)
3 How do we use Some?
_ some
_ sometimes or sometime.
_ someone.
"Some" can be an adjective and an adverb.
ADJECTIVE1. It's a quantifier and as a common rule, 'some' is usually used in a positive/affirmative sentence.
- I have some books.
2. Its meaning is 'remarkable', according to
www.onelook.com.
- It was some party!!
3. Its meaning is 'not specific'.
- She said she's going to some place.
ADVERB
1. = of quantities) imprecise but fairly close to correct or approximately
- Some forty people came. (
www.onelook.com)
Sometimes is an adverb of frequency while sometime is an adverb too but means 'an unspecific time'. Another one you should consider is 'some time' which means 'a considerable period of time'.
Someone is a pronoun which means some person or somebody.

4 What different between Ones and One?
There's not a really big difference between them. One is singular while 'ones' is plural.
- Which one do you choose? I like that one.

- Those cars need washing but I won't wash the most ugly ones for you without any payment.
5 In English songs does their grammar always be correct?
I have never written a song or poem. As I have read some poem, everything has to go along the rules of poetry so when you see there's a grammatical mistake, it's the rule of poetry.
6 What different between Future continues and Present continues (future)?
ex. I am watching tv tonight at 7:00pm.
I will be watching tv tonight at 7:00pm.
The difference between them is: "I am watching TV tonight at 7:00 pm" shows a careful future arrangement. "I will be watching TV tonight at 7:00 pm" shows a progressing action in the future. The speaker might want to say that 'he/she expects himself/herself to be watching TV at that time.
7 What different between Steel and Iron? Timetable and Schedule? Sensible and Sensitive?
- Iron =
a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood...
- Steel =
an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range
"Iron" is a substance and "steel" is a mixture of iron.
www.onelook.com