Because I was tired, I stopped learning English.
Since she studied hard, she passed the English test.
Because it was raining, we didn't go to English class.
As the lesson was interesting, the students were happy.
Because he watched English movies every day, his listening improved.
Since the classroom was noisy, I couldn't hear the teacher.
Because she was shy, she didn't speak in the English club.
As he didn't know the words, he used a dictionary.
Because English is important, many people want to learn it.
Because she practiced every day, she became confident in speaking.
Because people didn't have electricity, they used oil lamps.
Since there were no cars, people walked everywhere.
Because it was cold, they made a fire to keep warm.
Because life was hard, people worked all day.
Because there was no television, children played outside.
As the river was clean, people drank water from it.
Because schools were far away, children couldn't go to school.
Since the weather was good, farmers started working early.
Because there were no machines, farmers used animals to work.
As people were poor, they made their own clothes.

I was tired, so I stopped learning English.
→ Because I was tired, I stopped learning English.
She studied hard, so she passed the English test.
→ Since she studied hard, she passed the English test.
It was raining, so we didn't go to English class.
→ Because it was raining, we didn't go to English class.
The lesson was interesting, so the students were happy.
→ As the lesson was interesting, the students were happy.
He watched English movies every day, so his listening improved.
→ Because he watched English movies every day, his listening improved.
The classroom was noisy, so I couldn't hear the teacher.
→ Since the classroom was noisy, I couldn't hear the teacher.
She was shy, so she didn't speak in the English club.
→ Because she was shy, she didn't speak in the English club.
He didn't know the words, so he used a dictionary.
→ As he didn't know the words, he used a dictionary.
English is important, so many people want to learn it.
→ Because English is important, many people want to learn it.
She practiced every day, so she became confident in speaking.
→ Because she practiced every day, she became confident in speaking.
People didn't have electricity, so they used oil lamps.
→ Because people didn't have electricity, they used oil lamps.
There were no cars, so people walked everywhere.
→ Because there were no cars, people walked everywhere.
It was cold, so they made a fire to keep warm.
→ Because it was cold, they made a fire to keep warm.
Life was hard, so people worked all day.
→ Because life was hard, people worked all day.
There was no television, so children played outside.
→ Because there was no television, children played outside.
The river was clean, so people drank water from it.
→ Because the river was clean, people drank water from it.
Schools were far away, so children couldn't go to school.
→ Because schools were far away, children couldn't go to school.
The weather was good, so farmers started working early.
→ Because the weather was good, farmers started working early.
There were no machines, so farmers used animals to work.
→ Because there were no machines, farmers used animals to work.
People were poor, so they made their own clothes.
→ Because people were poor, they made their own clothes.