You were - This is correct.
You were the best in the team.
Yes, it is grammar, but your spelling is wrong; it's spelt grammar.
Wrong grammar!
Wrong Grammar
nothing ! because your wrong grammar !
yes
No, because your grammar is wrong. DID+QUALIFIED=IDIOTIC GRAMMAR
The word his can only be maid a grammar mistake if spelled wrong or capitalized
Wrong spelling is the incorrect spelling of a word. Wrong grammar has a much broader meaning and can include using a word in the incorrect tense or sense, or inserting or omitting punctuation.
There is nothing wrong with "when will you come?"
Grammar is tricky. If you did not learn it as a child, the best way to learn it (and know whether your grammar is correct) is to find someone who speaks correct grammar and listen to them, a lot. NPR is a good place to listen to people who have good grammar.
Five seats, and your grammar is wrong
no, it's grammatically wrong