Wishes & regrets. Unreal past structures II
CHECK WHAT YOU KNOW!!
You can have a try at those online exercises if you feel you already master this concept. If you are successful, just do the task!; if you are not, have a look at the material below so you can learn how this works.
ONLINE EXERCISES
LEARN HOW IT WORKS: explanation & drilling practice
NOW SHOW YOU CAN DO IT!
LET'S SEE HOW PEOPLE USE IT!