1. My sister give me a new pair of jeans on my fifteenth birthday

-> I was given a new pair of jeans by my sister on my fifteenth birthday.
2. "Do your grandparents still live in Nha Trang now ? ” said Nam to me
Nam asked me if my grandparents still lived in Nha Trang then
3.

we will not  have to pay more this month if we reduce the use of water and electricity.

1. My sister gave me a new pair of jeans on my sixteenth birthday.

-> I..was given. a new pair of jeans..by my sister. on my sixteenth birthday............................................................................................................................

2. “ Do your grandparents still live in Nha Trang now?” said Nam to me.

-> Nam asked .me if my .grandparents still lived in Nha Trang then.................................................................................................................

3. Unless we reduce the use of water and electricity, we’ll have to pay more this month.

-> If we do not.reduce the use of water and electricity, we’ll have to pay more this month............................................................................................................................

4. She last wore that dress at her sister’s wedding.

-> She hasn’t..worn..that dress at her sister’s wedding.................................................................................................................

5. My father is a better cook than my mother.

-> My mother can’t..cook as good as my father.........................................................................................................

6. Although she performed well, she didn’t receive good comments.

-> Despite .her.good performance,.she didn’t receive good comments.......................................................................................................................