past simple present simple future simple yesterday today tomorrow the day before yesterday today the day after tomorrow that week this week next week last month/a month ago this month next month last year this year next year
Millions of animals die every year because man has polluted their natural homes. The country air, once clear and fresh, now may be polluted by power stations and factories. Some of our rivers are now empty of fish. All over the world the forests are dissapearing. People cut over the trees down because they need wood and paper or new places for farms and houses... Pollushion is very dangerous for people, wildlife and the environment. We live among litter and wastes which we were created ourselves.
the day before yesterday today the day after tomorrow
that week this week next week last month/a month ago this month next month
last year this year next year