bettysuy said:
I am confusing by the four conditional. Could you tell me what are zero, first, second and third conditional and give some examples?
First you are "confused by" not "confusing by".
Zero Conditional: used for habitual actions or accepted facts
It is created by if/when + two clauses with the same tense in each clause.
When I ate at Joe's, I had the ravioli. (past-past)
If I work late on a Tuesday, I take a taxi home. (present -present)
First Conditional: if + present tense, then future tense
If I pass this exam, (then) I will be promoted.
Second conditional: if + past tense, then present conditional
If I passed this exam, (then) I would be promoted.
If I were king (subjunctive), (then) I would eliminate all taxes.
Third conditional: if + past perfect, then past conditional
If I had passed this exam, I would have been promoted.