It's a worksheet or test about First Conditional
A first conditional sentence consists of two clauses, an "if" clause and a main clause. If the "if" clause comes first, a comma is usually used. If the "if" clause comes second, there is no need for a comma.
A first conditional sentence consists of two clauses, an "if" clause and a main clause. If the "if" clause comes first, a comma is usually used. If the "if" clause comes second, there is no need for a comma.