It-это местоимение употребляется как и для неодушевлённых предметов, так и для животных
How long have you been learning maths?
How long have you known your teacher?
Have you ever been abroad?
I think I can't help you.
We had better say it at once
May I come in?
He likes to watch television.
June couldn't open the door.
Tom isn't going to answer my question.
You would rather not to tell them the truth.
I heard him sing
I'm planning to visit Rome.
The children were not allowed to eat and ice-cream.
She said she would sooner to stay in the city
Предупреждаю, могут быть ошибки.