3. use should / shouldn't: occupy this seat, please — you should don't do it - you shouldn‘t do it. ' l. comfort your children, please. 2. don't smoke, please. 3. don't keep you bag here, please. 4. don't put heavy things on the rack, please. 5. don't walk, please
2. You shouldn't smoke.
3. You shouldn't keep your bag here.
4. You shouldn't put heavy things on the rack.
5. You shouldn't walk.