It-This | Commonly Confused Words

This

/ðɪs/

Used to refer to a specific thing or person that is nearby or has just been mentioned.

How could this be a quiet life?I have to stay in this prison.'I do not think it used to smell this bad.'

This word has no antonyms

/ɪt/

Used to refer to a thing, animal, or situation previously mentioned or easily identified.

It is you.Well, its very kind of him, and I thank him heartily.'It's all off.'

This word has no antonyms

It is used as a pronoun to refer to a previously mentioned or easily identifiable thing or subject.
This is used as a determiner or pronoun to specify a particular thing that is near in time, space, or context.
It is often used when the noun is already known or understood by the listener or reader.
This often introduces new information or specifies something closer or more immediate.
Both words are used for non-human subjects but this is more specific and situational.