itpronoun
It stands for a thing already known, or fills the subject place when a sentence needs one.
a thingused for a thing, an animal, or an idea that has already been mentioned or is already known
It is used for things and ideas, for an animal when its sex is not known or does not matter, and for a baby in the same way. For people, use he, she, or they. Its, with no apostrophe, is the possessive; it's is short for it is or it has.
- Where is my phone? I left it on the table.
- The soup is cold. Can you heat it up?
- I like this town; it is quiet.
- You forgot, didn't you? Admit it. (it stands for a whole idea)
Compare one (one stands for any thing of the kind, it for the particular thing: I need a pen; do you have one? Where is my pen? Have you seen it?)
weather and timeused as the subject of a sentence about the weather, the time, the date, or distance
Almost every English sentence needs a subject (commands are the exception), and it fills that place when there is nothing else to put there: It is raining, not Is raining.
before the real subjectused at the start of a sentence in place of a longer subject, such as to plus a verb or a clause with that, which then comes later
The real subject is the part after the adjective or noun: To say no is hard becomes It is hard to say no, which is far more natural in English. It seems, it appears, and it happens work the same way: It seems that nobody is home.
it was Sam whoused at the start of a sentence to point to one part of it, which is then followed by who, that, or which
This structure, it is or it was plus the part that matters plus who or that, tells the listener where to put the attention: It was the price that worried me says the price, and not something else.
the situationused for the situation or what is happening, without naming it
Phrases
Usage
It is usually used for a baby or an animal only when the sex is not known or does not matter; parents and owners usually say he or she. A country, a company, or a car is it in ordinary use.