What time is the meeting - language points

It - The little word with so many uses.

The word 'it' is used to refer to a word previously mentioned in order to avoid repetition of that word.

The day was full of surprises. It had started like any other. It = the day

I find maths really difficult. It's a complete mystery to me. It = maths

I have lost my wallet. If you find it, please let me know. It = my wallet

The word 'it' can also be used to anticipate a word mentioned later in the sentence.

It's great to see you. (To see you is great.) It = to see you

It's fun playing guitar. (To play the guitar is fun.) It = playing guitar

It's difficult to know what to do. (What to do is difficult to know.) It = to know what to do

The word 'it' is used as a 'dummy' subject when talking about weather, time, distance and cost.

It's raining.

It's time to go home.

It's past midnight.

It's 4 miles away.