It depends on the situation and wording.
Not when writing in a formal tone.
Example:
He got better at playing the piano.
He showed improvement in his piano playing.
No, "is got" is not considered proper grammar. It is better to use "have got" or "have" in most cases.
The proper grammar for that sentence is "She was much better than yesterday." This sentence is in the past tense and correctly compares her current state to how she was yesterday.
"Gotten" is generally considered acceptable American English grammar, but in British English, "got" is typically preferred.
"Got to" can be considered informal or colloquial grammar, but it is commonly used in spoken English to mean "have to" or "must." It is important to use proper grammar in formal writing and professional communication, but in casual conversation, "got to" is widely accepted.
No, it is not proper grammar. The correct phrasing is "you and I."
Yes, my week is going well. Thank you for asking!
That is not correct grammar. A better sentence would be "I went to the supermarket and found this item." In the proper sentence, there is an object and better structure.
The proper grammar for that sentence is "She was much better than yesterday." This sentence is in the past tense and correctly compares her current state to how she was yesterday.
"She did not have" is the proper grammar.
"Gotten" is generally considered acceptable American English grammar, but in British English, "got" is typically preferred.
"Got to" can be considered informal or colloquial grammar, but it is commonly used in spoken English to mean "have to" or "must." It is important to use proper grammar in formal writing and professional communication, but in casual conversation, "got to" is widely accepted.
Not sure, but questions regarding proper grammar would be a better start for you.
"Please give me a call" would be better.
"Don't it" is not proper grammar. The correct form is "doesn't it".
It is proper grammar to say, "I bet you".
no, that is definitely not proper grammar.
No, it is not proper grammar. The correct phrasing is "you and I."
I suggest you personally become better acquianted with grammar and the English language.