The family was there is acceptable in US English.
In English English you should say: The family were there.
This is one of the main differences between US and English versions of English.
You and your family are invited.
"On a train" is correct grammar.
Grammar.
The grammar is correct as it is.
No. The correct grammar is; "Yes, I have a girlfriend."
If you are writing possessively, i.e. "Her family's hoiday-home" then it would be correct grammar.
You and your family are invited.
Yes. It is correct.
What is your family's strengths. It is a possessive, so there is an apostrophe before the s.
No, "will be had" is not a correct grammar. The correct grammar would be "will have."
The correct answer is you and your family but if you want it to be completely correct you should write your family and you. If you want to talk about your family you should write my family and I.
Either is correct. It all depends upon how you say the words and what you wish to emphasize: "you" or "your family."
No, it is correct grammar, not a correct grammar.
"On a train" is correct grammar.
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'.
"July has just been started" is not correct grammar, instead the correct grammar is "July has just started."
I wish you and your family a happy new year.