Yes, this sentence is correct.
You are palpitating. This is a correct sentence.
Yes, the sentence "your retina is healthy" is correct.
no it is not a correct sentence.
That sentence is grammatically correct.
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'.
"You and him" is correct in a sentence such as, "I sent the tickets to you and him," versus a sentence such as, "You and he should send the tickets to me."
No - the sentence 'Had never been experience' is not a correct sentence.
Yes, the sentence is correct grammatically. The sentence is The frogs were in the water.
Yes, the sentence is correct.
This sentence is grammatically correct.
If you use 'you and he' as the subject of the sentence, it is correct: You and he will meet when we get to the restaurant.