It depends on the job. In most cases, slight, still-readable grammar mistakes are acceptable and usually corrected somewhere down the line. However, if you are making consistent, severe mistakes then your manager or boss may have to step in. Any job that relies heavily on good reading and writing skills (English teacher, professional author) is likely a lot less forgiving in terms of grammar mistakes.
Completely my dear sir.
There is nothing wrong with "when will you come?"
If you were doing your job there would be no reason for your employer to threaten to fire you.
Only if used in formal written communications but not in texting or email or verbally.
This is an incomplete sentence,thus being improper grammar.
Because you have improper grammar, (two "you"'s).
If you are asking if the phrase "Her and her team" is proper grammar, then yes it is. Improper grammar for the same meaning would sound off like, "Her and her's team" or "She and she team." You have it right.
You can, but it is considered improper grammar. Teachers don't like it when you do.
Have the employer write a letter stating that they only hire women so that they can fire them. Then have the employer get it notarized.
The sentence "Lets get into something formal today" is not correct grammar due to improper use of preposition.
Absolutely not it has nothing to do with the employer
improper grammar so i dont get what ur saying