Frist conditional VS Second conditional

Frist conditional VS Second conditional

1. Frist Conditional

   • there is a real possibility
     • that something will happen in the future
     • If I don't call you tonight, you can call me
       • Will you wait for me if I am late?
   • Structure:
     • If I do ..., I'll (= I will) ...
       • Instead of will
         • we can use other modal verbs: can, might, may, must, should.

2. Second Conditional

   • We use when:
     • Examples:
       • What would you do if you found a lot of money in the street?
         • If it wasn't dark outside, we could go out.
       • we must consider that:
         • We don't use will or would in the if-part of a conditional sentence.
           • The if-part of the sentence can go at the beginning or at the end
             • In a first conditional sentence, we can use when instead of if for things that we are sure will happen
         • In the second conditional we use if + past (if I did, if I didn't, etc.), but the meaning is not past.
   • we imagine a situation
     • or when there is very little or no possibility that something will happen.
   • Structure:
     • If I did ..., I'd (= I would) ...
       • Instead of would
         • we can use could or might.