Absolutely.
Yes, that is correct grammar.
I had walked past the girl earlier in the day.
I have to HAVE it cleaned.I had to HAVE it cleaned.
Yes it is correct.
No, it is not correct
This should say, The next stop will be somewhere in Vasayas, then it will be correct grammar. Written as it is it is not on correct grammar.
No, it's not correct grammar. The correct way to say it is: "was able to confirm"
No, it is not proper grammar. The correct phrasing is "you and I."
No, the correct grammar would be "Look at what you got."
Yes, the grammar of the sentence "The subject walked past the door" is correct. It has a subject ("The subject") and a verb ("walked") that agree in tense, and it conveys a complete thought.
Yes
Yes, 'you were correct' is perfect grammar. An example sentence: You were correct when you said that a tomato is a fruit.