1. Letters are typed in the office by Mary
2. You will be helped by his father tomorrow
3. Human life has been changed by science and technology
4. This bottle was broken by Peter
5. English is being learnt in the room
6. If I exercise daily, my health will improve better
7. If he weren’t so timid in love, he wouldn’t lose her
8. If he hadn’t been too lazy, he wouldn’t have got fired
9. If Kate likes K-pop music, she will spend her money to buy tickets for the concert
10. Unless you study harder, you’ll fail the next exam
Unless = if…not
11. Unless he practices writing every day, he can’t improve his writing skill
12. Unless you return this book to the library today, you’ll have to pay a fine
13. Unless I knew the number, I wouldn’t ring her up
