Grammar: Zero conditionals

Look at this conversation:

Ryan: What do you do during the day?
Aziz:   I come to college.
Ryan:  Good answer. How do you get here?
Aziz:   On foot. But this is Manchester so sometimes it rains. If it rains, I don't walk.
Ryan:  So what happens if it rains?
Aziz:   Well, if it rains, I get the bus. Actually, to be honest, most days I get the bus.

If it rains, I get the bus. Why does Aziz get the bus? Because it rains.

There are two actions here: Aziz gets the bus and it rains. But Aziz gets the bus because it rains: this is the result of the rain, this is what happens when it rains.

When we talk about actions (it rains) and results (Aziz gets the bus), we use a conditional sentence:
We're going to look at three conditional structures, called zero, first and second conditionals. Let's look at zero conditionals first:

If it rains, I don't walk.
If it rains, I get the bus.
What happens if it rains?

We're talking about things that are always true: facts, habits or routines. Some more examples:
If you win the lottery, you get rich.                         If you come from Manchester, you speak English.
If you come from Spain, you are Spanish.              If you can't see, you need to wear glasses.

These things are always true, so we often use when instead of if:
When you come from Spain, you are Spanish.        When you can't see, you need to wear glasses.

The structure of zero conditionals is:

IF + present simple/present continuous         ,        present simple/ present continuous
          If you win the lottery                              ,                   you get rich

Present simple/ present continuous                        IF + present simple/ present continuous
          You get rich                                                              if you win the lottery

Try and complete these zero conditional sentences:

1. If you have a headache, .....
2. If I buy my coffee at Costa, .....
3. Ask your teacher if .....
4. If you want to pass your test, .......