Discuss - discussion
Repeat - repeat
Pronounce - pronunciation
Explain - explanation
Revise - revision
Translate - translation
Improve - improvement
Express - expression
Select - selection
Know - knowledge
If I work during holidays it'll be a good idea.
Unless she pay the fine now she'll be taken to court.
If I went to London I would improve my English.
If I won enough money in a lottery I would go on a round-the-world trip.
If meeting finishes late I'll get a taxi.
If I get a pay rise next week I will buy a new TV.
If I didn't feel sick I would go to the party.
If he fail his exam he'll take it again.
If tomorrow is rain I'll not walk to work.
If he knew her email address he would send her an email.
I won't forgive her if she doesn't apologise to me.