The document discusses zero conditional sentences, which describe things that are generally or always true. A zero conditional uses the simple present tense in both the if-clause and main clause. They can usually substitute "when" for "if". Examples are provided of yes/no and wh- questions using zero conditionals. Common substitutions are given, such as water freezing when cooled to 0°C or getting wet when going swimming. Zero conditionals express things that routinely or inevitably happen under certain circumstances.

1. ZERO CONDITIONAL

2. If I have a problem
condition
,
I talk to my friends.
main clause
NOTE: Don’t forget to use a comma after the if clause.

3. I talk to my friends
if I have a problem
main clause
condition
NOTE: Don’t use a comma after the if clause.

4. Zero conditional sentences describe things
that are generally true.
general truth
something that is
normally/always true

5. Use the Simple Present for both if clause
and the main clause.
If + Simple Present
Simple Present
If my team loses,
I am very sad.
Simple Present
If + Simple Present
I am very sad
if my team loses.

6. We can usually substitute when for if
in zero conditional sentences.
If you heat water, it boils.
When you heat water, it boils.

7. YES / NO QUESTIONS
WITH
ZERO CONDITIONAL

8. Yes / NO question
Short Answer
(Affirmative)
Short Answer
(Negative)
Do you cry if/when you are
sad?
Yes, I do.
No, I don’t.
If/When your father comes,
does he hug you?
Yes, he does.
No, he doesn’t.

9. WH- QUESTIONS
WITH
ZERO CONDITIONAL

10. Wh- Question
What do you do if/when you have a problem?
If/When you have a problem, what do you do?
Where does she go if/when she has a problem?
If/When she has a problem, where does she go?

11. If/When you cool water to 0° C, it freezes.

12. If/When you go swimming, you get wet.

13. If/When you practice English every day,
you learn fast.

14. If/When we meet after work,
we have coffee together.

15. If/When there is no oxygen, living things die.

16. THANKS 
thechadash