If you give her a present, she will be happy.
She will be happy if you give her a present.
There are different types of conditional sentences.
Conditional Sentences Type 0 (general truth)
We use them when we want to express that something is always true.
Form:
If + present, present.
If you mix yellow and red, you get orange.
If + past, past
If I made a promise, I kept it.
LINK:
http://perso.wanadoo.es/autoenglish/gr.zero.i.htm
Conditional Sentences Type 1
We use them when we want to express probable or real situations in the present or future.
Form:
If + simple present, will.
If she studies, she will pass her exams.
Variations.
If – clause: present continuous / present perfect
Main clause: can / may / must / imperative / should.
If you have a doubt, ask me.
If you have finished the exercises, you can watch TV.
If he doesn’t pay the fine, he may go to prison.
If she is tired, she must / should go to bed.
If you are looking for Sam, you’ll find him in the garden.
LINKS:
http://perso.wanadoo.es/autoenglish/gr.con1.1.i.htm
http://perso.wanadoo.es/autoenglish/gr.con1.2.i.htm
http://perso.wanadoo.es/autoenglish/gr.con1.3.i.htm
http://www.englisch-hilfen.de/en/exercises/if1.htm
http://www.english-4u.de/cond_clauses_ex1.htm
http://www.go4english.com/vg/read.php?unitid=1688 (environment)
Conditional Sentences Type 2
We use them when we want to express imaginary situations in the present or future.
Form:
If + past simple, would
If I had a lot of money, I would buy a big house.
We can also use “If I were you…” when we want to give advice.
If I were you, I would buy the red car.
Note: we can use “were” for all persons in conditional sentences type 2.
If she was / were in England she would visit Stonehenge.
Variations:
If- clause: Past continuous
Main Clause: could / might
If he wasn’t working, he would be able to come to our party.
If I met my favourite singer, I might ask him about his next CD.
LINKS:
http://perso.wanadoo.es/autoenglish/gr.con2.1.i.htm
http://perso.wanadoo.es/autoenglish/gr.con2.2.i.htm
http://perso.wanadoo.es/autoenglish/gr.con2.3.i.htm
http://www.englisch-hilfen.de/en/exercises/if2.htm
Conditional Sentences Type 3
We use them when we want to express imaginary situations in the past that can now never happen. We also use them to express regret or criticism.
Form:
If + past perfect, would have + past participle
If I had studied, I wouldn’t have failed my exams. ( I didn’t study)
If we had gone by plane, we would have saved time.
Variations:
Main clause: could / might have + past participle
If he had known about the meeting, he could have told us.
If he had known about the meeting, he might have told us.
LINKS:
http://perso.wanadoo.es/autoenglish/gr.con3.i.htm
http://www.englisch-hilfen.de/en/exercises/if3.htm
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