The rocket launched. The countdown reached zero.
when / since / as
I brush my teeth. I go to bed
before
I will wait here. You come back.
until
I reviewed very hard for the test. I got low score.
although
We finish all of our homework. We help Mom to clean the house.
after / when / as / since
The rocket launched late. There was a problem with the engine.
because / since / as
They were walking through the park. It suddenly started to rain.
when / while / as
The astronaut put on the helmet. The astronaut left the spacecraft.
before
He kept running. He was tired.
The astronaut felt very nervous. She stepped onto the Moon.
She didn’t understand the lesson. She asked the teacher for help.
You don’t hurry. You will miss the bus.
if
The students had revised thoroughly. They still felt nervous before the exam.
The mission was dangerous. The team continued their work.
I want to improve my confidence. I practice public speaking every day.
because / since / as
He did not want to make any mistakes. He carefully checked his answers.
because / since / as
The experiment failed. The equipment was outdated.
because
I were a bird. I would be a dove.
if
She didn’t follow the instructions carefully. She made several mistakes.
I was 5 years old. I started to learn English.
when
My mom is cooking. My dad is reading a newspaper.
While