Here is a brief explanation of how 'whatever', 'whenever', 'wherever', 'whichever' and 'whoever' are used:
Whatever = anything or everything; regardless of what, (many things can happen but):
Whatever you do, don’t forget to buy the drinks for dinner tonight.
Ignore David, whatever he says. He's just a joker.
Whenever = every time; at any time; when is not important:
Whenever I plan a barbeque it rains.
Peter interrupts me whenever I speak.
Wherever = everywhere; in doesn't matter where; where is not important:
Wherever you go in the world you'll always find someone who speaks English.
We can go wherever you like tonight; it's your birthday.
Whichever = the person or thing which; it doesn't matter which; which is not important:
Choose whichever dress you like.
Wear whichever dress is most comfortable.
Whoever = the person who; it doesn't matter who:
You can invite whoever you like to the concert.
Whoever prepared dinner made a mess in the kitchen.
Lesson by Tristan, teacher at EC Malta English school
Now choose the correct word from the following: