a subject which teaches you about the rules of the country, the Constitution, people's rights, sometimes crime, etc.
law
If we like / might like the hotel, we might stay / stay a few more days.
If we like the hotel, we might stay a few more days.
At the meeting we discussed to start / starting a business together.
discussed starting
He wanted to be/ being a musician.
He wanted to be a musician.
a verb which means that you feel sorry that you did something (or what you are going to do)
regret
If you pay / will pay the bill, I / I'll pay you back next week.
If you pay the bill, I'll pay you back next week.
Why did you choose to live / living in a city?
choose to live
She learnt speaking/to speak English very quickly.
She learnt to speak English very quickly.
A university degree where you study theatre.
drama
They won't/ don't enjoy the journey if they won't / don't get a seat.
They won't enjoy the journey if they don't get a seat.
Please, stop to talk / talking now and do your test.
stop talking
I enjoy to play/ playing basketball.
I enjoy playing basketball.
When you get ready for a test or exam, you do this to remember the information you learned at the lessons.
revise
What do / will you do if there is / there'll be a traffic jam?
What will you do if there is be a traffic jam?
Because of the noisy neighbours he couldn't concentrate on to do / doing his homework.
concentrate on doing (ING after prepositions)
Do you mind to work/working late?
Do you mind working late?
You get this (a Master's ___ or aBachelor's ____) after you finish a university course.
a degree
Are you going to / Do you cook if I get / might get home late?
Are you going to cook if I get home late?
I really avoid to meet / meeting my boss in the morning - he is usually very angry then.
avoid meeting
They have offered to help/ helping us.
They have offered to help us.