pronoun

 

thing used to refer to the thing, situation, or idea that has already been talked about

"Have you seen my bag?" "It's in the hall."

 

description used before certain adjectives, nouns, or verbs to introduce an opinion or description of a situation

It's unlikely that she'll arrive on time.

 

subject/object used with certain verbs that need a subject or object but do not refer to a particular noun

It costs less if you travel at the weekend.

 

time/weather used with the verb 'be' in sentences giving the time, date, weather or distances

It rained all day.

 

seem used as the subject of verbs such as 'seem', 'appear' and 'look'

It seemed unfair to leave her at home.

 

emphasize used to emphasize one part of a sentence

It's the children I'm concerned about, not me.