if+past perfect , would+have+past participle

Would+have+past participle , if+past perfect

if she hadn't been sick , she would have come to my party

USE:

Hypothetical situations which did not happen.The time is the past

if+past simple, would+ base form

wuold+base form if +past simple

EXSAMPLE

if I had a million euros, I wuold buy a bigger house

USE

hypotetical situations which are improbabòle or impossible

If present simple, present simple.

Present simple If present simple.

EXAMPLES:

If you stand in the rain, you get wet.

You get wet If you stand in the rain.

USE:

Scientific facts and things that are always true. The time is always, now.

IF + present simple, future simple

USE: real situations or events and their possible consequences. The time is the future.

EXAMPLES:

If it rains, I will take an umbrella.

If you eat too much, you will feel sick.