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 The equipment was outdated.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