He went to bed early because she felt tired

>>Because of her tiredness, he went to bed early

Margaret stayed at home because her mother was sick.

>> Because of her mother's sickness, Margaret stayed at home

I couldn’t do the test because it was difficult.

>> Because of being difficult, I couldn’t do the test

I couldn’t read the letter because it was dark.

>> Because of the darkness, I couldn’t read the letter

I can’t study because it is noisy.

>> Because of the noise, I can’t study

The train came late because it was foggy.

>> Because of the fog, the train came late

The train was late because the fog was thick.

>> Because of the thick fog, the train was late

I can’t sleep because the weather is hot.

>> Because of the hot weather, I can’t sleep

All of the teachers love him because his conduct is good.

>> Because of his good conduct, all of the teachers love him

*Câu nào sai thông cảm nha :))

because + S1 + V1, S2 + V2: vì

=> because of + Noun/V-ing, S2 + V2: vì

#HNgoc