ingles

a possible situation in the future

to talk about things that are always true (scientific facts)

hypotheticall situations

imagining a different past

to talk about real facts

to propone a different future

to unreal or improbable situations nor or in the future

to imagining a different future and present

if + past simple + would + verb

if+ present simple + will/ wont + infinitive

if+ present simple+ would + verb

if + future simple + present simple + infinitive

to replace a subject (depend to the main sentence)

to replace an affirmation

to replace a past situation

to replace a noun ( depend to the main verb)

i promise be there on time

we stopped him from cross the street

i promise to be there on time

we stoped him from crossing the street