USE - TO DESCRIBE SITUATION THAT HAPPEN WHENEVER THERE IS A CERTAIN CONDITION / GENERAL TRUTHS, SCIENTIFIC FACTS, RULES, HABITS.
A. IF/WHEN + SUBJECT + V (PRESENT SIMPLE), SUBJECT + V (PRESENT SIMPLE)
If/when you heat water to 100ºC, it boils.
If/When I don't exercise every day, I don't sleep well.
B. SUBJECT + V (PRESENT SIMPLE), + IF /WHEN + SUBJECT + V (PRESENT SIMPLE).
Water boils if/when you heat it to 100ºC,
I don't sleep well at night if/when I don't exercise every day.
USE - TO DESCRIBE REAL AND POSSIBLE FUTURE SITUATIONS // PROMISES, THREATS.
A. IF + SUBJECT + V (PRESENT SIMPLE), SUBJECT + WILL + V.
If you reveal this secret, I won’t talk to you again.
If the Maths teacher is angry, he will scold his students.
B. SUBJECT + WILL
+ V + IF + SUBJECT + V
(PRESENT SIMPLE).
I won’t talk to you again if
you reveal this secret.
The Maths teacher will scold
his students if he is
angry.
C. IF + SUBJECT + V (PRESENT SIMPLE), IMPERATIVE.
If you miss
the train, get the bus.
I. REPLACING “IF” WITH OTHER CONNECTORS
→ IF = AS
LONG AS, PROVIDING THAT / PROVIDED THAT (formal): “siempre y cuando”, “siempre
que”.
You will continue to pass the
exams as long as you study every day.
You will continue to pass the exams providing that you study every
day.
- “As long as” and “providing that” are emphatic, they
mean “ONLY IF”.
- Also emphatic: “EVEN IF”
(“incluso si”): Even if he apologised to me, I wouldn’t forgive him.
→ IF … NOT
= UNLESS
You will not pass the exams if
you don’t study every day.
You will not pass the exams unless
you study every day.
II. USING MODALS IN THE FIRST CONDITIONAL
- “Will” in the result clause can be replaced with
modals:
1. Permission: Can. If you need to correct that exam, you can use my red pen.
2. Possibility: May, might. If you call him, he may/might
come.
3. Obligation: Must. If you accept that job offer, you must
leave your current job.
4. Suggestion: Should. If you are in love with Jane, you should
ask her out.
USE - TO DESCRIBE IMAGINARY
PRESENT OR UNLIKELY FUTURE
SITUATION // HYPOTHETICAL FUNCTION.
A. IF + SUBJECT + V
(PAST S.), SUBJECT + WOULD// COULD/ MIGHT (- probable) + V
If I won the lottery (improbable situation), I would/could/ might buy a huge house.
If Mary decided to accept
that job (improbable situation), she wouldn’t inform you about it.
B. SUBJECT + WOULD // COULD/MIGHT + V + IF + SUBJECT + V (PAST SIMPLE)
I would/ could/ might buy a
huge house if I won the lottery.
Mary wouldn’t inform you
about her new job if she decided to
accept it.
→
TO BE: IF I/HE/SHE/IT
+ WAS (informal) / WERE...
If I was/were older, I would buy a car.
If he was/were a good
student, he wouldn’t fail all the
subjects.
→ IF I WERE
YOU…. (ONLY TO GIVE ADVICE)
If I were you, I would go on a diet.
If I were you, I would be more patient with your little
sister.
USE - TO DESCRIBE IMPOSSIBLE SITUATIONS BECAUSE THEY ARE
PAST EVENTS (Regret over a past action).
A. IF + SUBJECT + V
(PAST PERFECT S.), SUBJECT + WOULD//COULD/MIGHT HAVE + Past Participle.
If I had listened to my
parents, I would/could/might have been more successful in life.
If I had applied for that
job, I would/could/might have got it.
B. SUBJECT + WOULD// COULD/ MIGHT HAVE + Past Participle , IF + SUBJECT + PAST PERFECT SIMPLE.
I would/could/might have been
more successful in life if I had
listened to my parents.
I would/could/might have got
that job if I had applied for it.
ATTENTION - HAD (’D) / WOULD
(’D). Example: If I’d applied for that job, I’d have got it.
MIXED CONDITIONALS
A. IF + SUBJECT + V (PAST PERFECT S.), SUBJECT + WOULD//COULD + V.
If you had studied, you would/could have a good job now.
B. IF + SUBJECT + V (PAST PERFECT S.), SUBJECT + WOULD//COULD + V.
You would/could have a good job now if you had studied.
FUTURE TIME CLAUSES
They refer to a future action or event using the present tense.
Time conjunction + SUBJECT + PRESENT SIMPLE TENSE, SUBJECT+ WILL + V
Time expressions: after before until till as soon as as long as when once by the time the moment whenever providing that
I will call you as soon as I leave the office. As soon as I get home, I will buy the tickets for the concert.
The ones which refer to general thruths are formed like the Zero Conditional and they are not "future" time clauses (see above).
USE – WISH FOR A CHANGE, REGRET FOR A PRESENT OR PAST
SITUATION
1. WISH / IF ONLY + PAST
SIMPLE/ COULD (personal ability, permission): PRESENT WISH / REGRET
I wish I had a car! He wishes he could go on holiday. If only she were on the beach.
2. WISH / IF ONLY + WOULD: DISATISFACTION WITH SOMEBODY’S ACTIONS
(NOT OUR OWN) IN THE PRESENT / DESIRE OF (UNLIKELY) FUTURE CHANGE
I wish he would stop talking.
I wish my neighbours wouldn’t
disturb me. I wish you would come to the cinema with me. I wish it would rain tomorrow.
Attention - "I WISH I WOULD...." is incorrect because "would" implies a desire for a different person's willingness or choice to change.
3. WISH / IF
ONLY + PAST PERFECT SIMPLE: PAST WISH / REGRET
I wish I had
studied harder at school. If only
my mother hadn’t punished me!
CONDITIONAL SENTENCES - SUMMARY
I. IF + S + V (PRESENT SIMPLE), S + WILL + V
II. IF + S + V (PAST SIMPLE), S + WOULD// COULD/ MIGHT (- probable) + V
III. IF + S + V (PAST PERFECT SIMPLE), S + WOULD//COULD/MIGHT HAVE + PP.
CONDITIONAL SENTENCES - INVERSION
FIRST TYPE: Should + subject + verb, subject + verb + complements
Should she go to watch the film, she will love it.
SECOND TYPE: Were + subject + to + infinitive, subject + verb + complements
Were he to go to University, his parents would be very proud of him.
THIRD TYPE: Had + subject + Past Participle, subject + verb + complements
Had it rained, we would have stayed at home.
