`5`. She made mistakes because she wasn't experienced.
`->` because + S + V: bởi vì `=>` mệnh đề chỉ nguyên nhân ( she wasn't experienced )
`6`. I didn't know that she had been married since she seldoms talks about herself.
`->` since = because + S + V: bởi vì `=>` mệnh đề chỉ nguyên nhân ( she seldoms talks about herself )
`7`. She took a break because she wasn't feeling well.
`->` because + S + V: bởi vì `=>` mệnh đề chỉ nguyên nhân ( she wasn't feeling well )
`8`. She was soaked to the skin as it was raining very hard.
`->` since = because + S + V: bởi vì `=>` mệnh đề chỉ nguyên nhân ( it was raining very hard )
