Good grammar is very important in order to not be misunderstood.
I went to a good grammar school.
Your grammar is appallingly atrocious.
The grammar of this sentence is beyond phenomenal.
no_____If the sentence is You do do that (meaning You are in the habit of doing that) the grammar is perfectly correct and the sentence 'does have correct grammar'.
No. It should be "Is the grammar right in this sentence?"
A sentence with broken grammar is often referred to as a "grammatically incorrect" or "ungrammatical" sentence.
The correct grammar for this sentence is: "When did you send it?"
No.
The sentence should say "Are there any grammatical errors in this sentence?"
There is no such thing as an "extended sentence" in grammar. "Extended sentence" is a legal term, not a grammatical term.
If you mean: Is the sentence "Is this grammar right?" grammatically correct (or right), then yes, it is.
That sentence is grammatically correct.
There is no sentence in the question on which to base an opinion.
The correct grammar is "Between you and me."