English clauses always have a subject:

His father has just retired. Was a teacher. > He was a teacher.
I’m waiting for my wife. Is late. > She is late.
Look at the time! Is half past two.> It’s half past two.

except for the imperative (see more)

Go away.
Play it again please.

If we have no other subject we use there or it.

there

We use there as a dummy subject with part of the verb be followed by a noun phrase. (see Clauses, sentences and phrases):

• to introduce a new topic:

There is a meeting this evening. It will start at seven.
There has been an accident. I hope no one is hurt.

• with numbers or quantities:

There was a lot of rain last night.
There must have been more than five hundred in the audience.

• to say where something is:

There used to be a playground at the end of the street.
There are fairies at the bottom of the garden.
I wonder if there will be anyone at home.

• with an indefinite pronoun or expressions of quantity and the to-infinitive:

There is nothing to do in the village.
There was plenty to read in the apartment
There was nothing to watch on television.
There is a lot of work to do

If we want to show the subject of the to-infinitive we use for:

There is nothing for the children to do in the village.
There was plenty for us to read in the apartment
There was nothing for them to watch on television.
There is a lot of work for you to do.

• with an indefinite pronoun or expressions of quantity and an -ing verb:

There is someone waiting to see you.
There were a lot of people shouting and waving.

We use a singular verb if the noun phrase is singular:

There is a meeting this evening. It will start at seven.
There was a lot of rain last night.
There is someone waiting to see you.

We use a plural verb if the noun phrase is plural:

There are more than twenty people waiting to see you.
There were some biscuits in the cupboard.
There were a lot of people shouting and waving.
 

It

We use it to talk about:

• times and dates:

It’s nearly one o’clock.
It’s my birthday.

• weather:

It’s raining.
It’s a lovely day.
It was getting cold.

• to give an opinion about a place:

It’s very cold in here.
It will be nice when we get home.
It’s very comfortable in my new apartment.

• to give an opinion followed by to-infinitive:

It’s nice to meet you.
It will be great to go on holiday.
It was interesting to meet your brother at last.

• to give an opinion followed by an -ing verb:

It’s great living in Spain.
It’s awful driving in this heavy traffic.
It can be hard work looking after young children.

  

Using "it" to talk about people

We use it to talk about ourselves:

• on the telephone:

Hello. It’s George.

• when people cannot see us:

[Mary knocks on door] It’s me. It’s Mary.

We use it to talk about other people:

• when we point them out for the first time:

Look. It’s Sir Paul McCartney.
Who’s that? I think it’s John’s brother.

• when we cannot see them and we ask them for their name:

[telephone rings, we pick it up] Hello. Who is it?
[someone knocks on door. We say:] Who is it

 

Task 1

 Exercise

Task 2

 Exercise

Comments

Hi Iwona_Z,

If you want to point out twins to the person you are speaking to, I'd suggest something like 'Look at those twins over there!' or 'Look at the Johnson twins over there!'

All the best,
Kirk
The LearnEnglish Team

Hi,
It is important for them to be there. Does this mean the same as "It is important that they be there", that is, them being there is important, or Does this mean them being there is important to them?
Also,
It is unacceptable for them to do that. Does this mean them doing that action is unacceptable, or doing that action is unacceptable to them?

Hello sam61

In general -- in other words, unless the context indicates otherwise -- the sentences would mean the same thing and would indicate the perspective of the person who wrote or spoke them. If you wanted to talk about it being important for 'them', i.e. that those people consider it important, you could say, for example, 'For them, it is important to be there'. But even in this case, I would want to emphasise this with another statement clarifying exactly who it is important for (e.g. 'For the parents of very young children, it is important for them to witness their child's first step.').

I would say the same thing about the second pair of sentences you ask about.

All the best

Kirk

The LearnEnglish Team

Pages