"He showed it to her" is much better.
no it is not a correct sentence.
This is not a sentence it is a phrase and as a phrase it is correct.
The sentence, "They are going to the beach." is correct.
This sentence is not grammatically correct. For the sentence to be grammatically correct, the space between "in" and "to" would have to be removed. Therefore the sentence should read "They are into skating."
Yes this is a correct sentence.
I showed him to his room.
Has shown is correct.
Has shown is correct.
"How are you" is a correct sentence.
Yes, this sentence is correct.
You are palpitating. This is a correct sentence.
"Our agent showed the house yesterday" is a statement.
i showed him my blessings
With the exception of not capitalizing the 'y' at the start of the sentence, it is a correct sentence.
The teacher showed her class how to read a book. The farmer showed his best bull at the local show.
That sentence is grammatically correct.
no it is not a correct sentence.