Conditionals

Question 1

zero Conditional

Answer 1

always true (If X happens, Y happens)

When/If you (present simple)press the switch, the light (present simple)comes on

Question 2

Conditional 1

Answer 2

real conditions (If X happens, Y will happen)

If we (present simple)do not deal with the global warming problem, 
temperatures (will future)will rise.

Unless (=If something does not happen, something else will happen)
e.g. Unless we deal with the global warming problem, average temperatures will rise.

Provided, as long as + present simple (=only if)
e.g. Provided/ as long as we reduce energy consumption, we can slow down global warming.

Question 3

conditional 2

Answer 3

unreal conditions (If X happened, Y would happen)

If you (past simple) were on Venus, you (would + Verb) would see the Sun rise in the west.

Giving advice (If I were you)
e.g. I wouldn't do that, if I were you. or If I were you, I wouldn't do that.