First conditional and future time clauses + when, until, etc.

• First conditional sentences: if (or unless) + simple present, will / won't + base form

Use the present tense (NOT the future)  after if  in first conditional sentences.

unless = if . . . not
I won't go unless she invites me. = I won't go if she doesn't invite me.

You can also use an imperative instead of the will clause. e.g., Come and see us next week if you have time.

• Future time clauses

As soon as you get your test results, call me.
We'll have dinner when your father gets home.
I won't go bed until you come home.
I´ll have lunch before I leave.
After I graduate form college, I'll probably take a year off and travel. First conditional