First Conditional -
If it ..., I ... to the park. (rain, not go)
If it rains, I won't go to the park .
If she ... well in this interview, she ... the job. (do, get)
If she does well in this interview, she’ll get the job.
She ... the bus if she ... soon. (miss, not leave)
She'll miss the bus if she doesn't leave soon.
Please, ... me if you ... late. (call, be)
Please, call me if you’re late.
Their teacher ... sad if they ... their exam. (be, not pass)
Their teacher will be sad if they do not pass their exam.
We ... the plane if we .... (not miss, hurry)
We won’t miss the plane if we hurry.
If we ... in time, we ... out. (not finish, not be able to, go)
If we don't finish in time, we won't be able to go out.
Your teacher ... if you ... something. (can help, not understand)
Your teacher can help if you don’t understand something.
If I ... this exam, I ... it again. (pass, have to, do)
If I pass this exam, I won’t have to do it again.
If we ... today, we ... out of the competition. (not win, be)
If we don’t win today, we’ll be out of the competition.