Present Continuous
Stop
Stopping
Study
Studied
I, he, she, it ------> _________
WAS
Listen (past)
Listened
Arrive (Continuous)
Arriving
Play
Playing
Stop
Stopped
WERE
Visit (past)
Visited
Stay (Continuous)
Staying
The officers cleaning the hallway now.
The officers are cleaning the hallway now.
The cadet open the door yesterday.
The cadet opened the door yesterday.
I were on duty yesterday.
I was on duty yesterday.
We is preparing the uniforms.
We are preparing the uniforms.
They not working in the office now.
They aren't working in the office now.
He are checking the radio.
He is checking the radio.
We was talked to the captain last night.
We talked to the captain last night.
She not was at the meeting.
She was not at the meeting.
I was helped the team with the task.
I helped the team with the task.
They arrive at the base early. (past)
They arrived at the base early.
I watching the cameras at the moment.
I am watching the cameras at the moment.
She clean the room before the inspection.
She cleaned the room before the inspection.
They was in the classroom this morning.
They were in the classroom this morning.
He were the new recruit.
He was the new recruit.
You was very focused during training.
You were very focused during training.