No, grammar is spelled grammar in the U.S.
Yes, grammar is the correct spelling.
Grammar
A. The correct spelling is grammar.
(B) The word for the application of proper English usage is "grammar".
The word his can only be maid a grammar mistake if spelled wrong or capitalized
"G-R-A-M-M-A-R" (You should know, since you spelled it out in your question.)
Since you put this question in Grammar Spelling and Punctuation, what is your question? The sentence is spelled correctly and punctuated correctly, and the grammar is fine.
The US State is spelled Massachusetts.
Yes, "She's coming with us" is correct grammar. It is a shortened form of "She is coming with us."
To correct grammar, you can use tools like grammar checkers or proofreading services. You can also improve by reviewing grammar rules and practicing writing regularly. Reading more can also help you become more familiar with correct grammar usage.
The word is "spelled" in the US, although "spelt" is still a variant in the UK.
The name of the northeastern US state is spelled Massachusetts.