I study, my sister watches TV.
While I was studying, my sister was watching TV.
I sleep at midnight.
I wasn't sleeping at midnight.
She reads a book.
Was she reading a book?
She studies for the exam.
Wasn't she studying for the exam?
I walk to school, it stard to rain.
I was walking to school when it started to rain.
They talk, we take notes.
They were talking while we were taking notes.
She uses her phone in class.
She wasn't using her phone during class.
They play basketball.
Were they playing basketball?
They wait for the teacher.
Weren't they waiting for the teacher?
She takes a shower, the phone ring.
She was taking a shower when the phone rang.
The children play, their parents read.
The children were playing while their parents were reading.
They wait the bus.
They weren't waiting for the bus.
He studies for the test.
Was he studying for the test?
He works yesterday.
Wasn't he working yesterday?
They play soccer, the lights go out.
They were playing soccer when the lights went out.
I write, my friend does homework.
I was writing an email while my friend was doing homework.
We worked yesterday afternoon.
We weren't working yesterday afternoon.
You watched TV last nigth.
Were you watching TV last night?
You listen to the instructions.
Weren't you listening to the instructions?
We have dinner, our friends arrive.
We were having dinner when our friends arrived.
She cooks, her husband sets the table.
She was cooking while her husband was setting the table.
He drives too fast.
He wasn't driving too fast.
It rained yesterday morning.
Was it raining yesterday morning?
It snowed the last winter.
Wasn't it snowing last winter?
He drives to home, he sees an accident.
He was driving home when he saw an accident.