1. He will introduce his girlfriend on his next birthday.
His girlfriend will be introduced on his next birthday
2. “ When will you return the books to the library?” she asked me
She asked me when I would return the book to the library.
3. If you don’t try hard, you will not pass your final exam
Unless you try hard, you will not pass your final exam
4. It’s a pity I didn’t take my doctor’s advice.
I wish I had taken my doctor's advice.
5. She knows a lot more about it than I do.
I don’t know as much about it as she does.
6. My sister was tired but she helped me with my homework.
Although my sister was tired, she helped me with my homework.