2. Past Simple They watched a TV-set yesterday.3. Future Simple They will watch a TV-set tomorrow.4. Present Progressive.They are watching a TV-set right now.5. Past Progressive. They were watching a TV-set the whole evening yesterday.6. Future Progressive. They will be watching a TV-set this time tomorrow.7. Present Perfect. They have just watched a TV-set.8. Past Perfect They had watched a TV-set by 10 o'clock.9. Future Perfect. They will have watched a TV-set .10. Present Perfect Progressive. They have been watching a TV-set since morning.11. Past Perfect Progressive. They had been watching a TV-set for 4 hours when the TV screen suddenly went blank.12. Future Perfect Progressive.They will have been watching a TV-set.