For most Part 1 questions, think:

Answer → Explain → Add something

You do not have to use all three steps every single time, but this gives you an easy way to develop your ideas.

1. Answer the question directly

Start by actually answering what you were asked.

Do you enjoy cooking?

Yes, I do.

Do you often use public transport?

Not particularly.

Did you read a lot when you were a child?

Yes, definitely.

Would you like to live in another country?

I think so.

Avoid spending several sentences introducing your answer before answering the actual question.

2. Explain Why

Now give the examiner a reason.

Do you enjoy cooking?

Yes, I do, mainly because I find it quite relaxing after a long day.

Do you often use public transport?

Not particularly, because I live fairly close to most of the places I need to go.

Did you read a lot when you were a child?

Yes, definitely. I was quite a bookworm when I was younger.

A reason immediately makes your answer more developed and natural.

3. Add a Detail, Example, Contrast or Result

Now you can add one more piece of information.

For example:

Yes, I really enjoy cooking because I find it quite relaxing after a long day. I particularly like making pasta dishes because they’re relatively simple and don’t take too much time.

Or:

I don’t use public transport very often because I live fairly close to most places I need to go. If I’m travelling somewhere farther away, though, I’ll usually take a bus rather than a taxi.

Or:

Yes, I read a lot when I was a child. I was actually quite a bookworm. I remember spending entire weekends reading adventure novels when I was about ten or eleven.

Your extra sentence can give:

an example
a personal experience
a contrast
a result
a preference
a comparison
a specific detail

This is what makes the answer sound like a conversation rather than an interview consisting of memorised sentences.