To talk about what you would like to do, use I would like to… or I want to…

I would like to meet him.

I would like to have a look at those photos.

I would like to talk to him about my problems.

I would like to discuss this issue with them.

I would like to invite you all for dinner.

I want to go.

I want to take you out on a date.

I want to help him.

I want to leave by 4 this afternoon.

To talk about something that you do not want to do, use I don’t want to…

I don’t want to talk to him.

I don’t want to invite him to my party.

I don’t want to wear this dress to the party.

I don’t want to stay in this room.

If you really want to do something, use I would really like to… or I would love to…

I would really like to see your new paintings.

I would really like to visit Amsterdam.

I would really like to take a vacation.

I would really like to take some photos of the town.

I would love to go swimming in the sea.

I would prefer to

To say that you want to do one thing and not another, use I would prefer to…

I would prefer to see a female doctor.

I would prefer to go to the beach.

I would prefer to go to a super specialty hospital.

I need to…

To say that it is important for you to do something, use I need to…

I need to talk to the secretary.

I need to improve my English.

I need to buy a laptop.

I need to see a doctor.