What's the conditional?
When is zero conditional used?
General truth, Universal truth, Habit.
When do we use first conditional?
A possible situation in the future or present.
When do we use Second Conditional?
Imaginary situations, untrue at present.
Say the tense differences between Zero Conditional and First Conditional.
Zero: all present tenses type
First: if-clause (present simple), main clause (will/may/might)
Compare Zero, First, and Second conditionals
Zero: general truth, if-clause (present), main clause (present)
First: possible situations, if-clause (present), main clause (future)
Second: imaginary situation, untrue to present, if-clause (past), main clause (would + bare infinitive)