Yes, very!
The sentence "Is Mary not Happy" is correct grammatically as a question. It defines Mary as the subject and not happy as the object. In the other sentence, though grammatically correct, it could be confusing. Not Mary could be construed as all people but Mary. I would use the first sentence, as it is clearest.
Mary and we. If Mary was not involved you wouldn't say "us" (i.e. "us like to go shopping").
"My lawyer advised me to plead not guilty." "Mary will plead with her father and hope that he gives her the money."
The correct way to write the sentence is "It was Mary and Andrew." This is because "Mary and Andrew" is a plural subject, but the verb "was" agrees with the singular subject "It."
The sentence needs a subject to be correct."I want to present this award to Mary."
It depends on context and which kind of like is meant. Both of the following are correct:"Mary likes me" and "Why would she care for a man like me?"
"More better" in any context is grammatically incorrect. The verb tenses are better and best. "Better than before" is grammatically correct. Example sentence: While the judges thought Mary's cake was better than before, they decided John's baking was better.
That depends on whether the phrase is a subject or predicate. "Mary and I were married last year." "The pastor married Mary and me."
In the sentence, "Mary parents gave her a watch at her party." the noun Mary is the incorrect form. The noun 'Mary' should be the possessive form to show that the 'parents' are the parents of Mary.The correct sentence is: "Mary'sparents gave her a watch at her party."The nouns in the sentence are:Mary'sparentswatchparty
John and Mary, I am going to town, do you want to come too?
"Send your response to Mary and me" is correct.It is always incorrect to say "to Mary and I" in any context.The easiest way to keep track is to substitute "we" or "us" for "Mary and I/me." "Mary and I" is equivalent to "we"; "Mary and me" is equivalent to "us."We went to the store ⇒ Mary and I went to the store.Send it to us ⇒ Send it to Mary and me.That will guide you naturally to the correct selection, except in the case of predicate nominatives. For example, "It is we" is grammatically correct, so you would substitute "It is Mary and I," but most people think either of those sounds odd.