You need to think before you answer your teacher's questions.
think/before
I always walk to school with my friends.
walk
You need to stop before you cross the road!
stop/before/road
Keep off my clean floor!
keep off/clean
They have to wash their dog.
wash
Shall I make dinner for you tonight?
Shall
Our bathroom isn't clean.
clean
He always stops at the traffic light before he crosses the road.
stop/before/road
I have to clean my room before I go to the party.
clean/before
He has to stop and think before he finishes his Maths exam.
stop/think/before
