<span>1. It’s possible that they don’t live here any longer. a They mightn’t live here any longer.
2. It isn’t possible that they are twins. b They can’t be twins.
3. It could be that they are not married. a They mightn’t be married.
4. It isn’t possible that there is some milk in the fridge. a There can’t be any milk left.
5. I think I saw her go out. a She mightn’t be at home.</span>
Air is not polluted.
Forests and animals are protected.
Litter is not put into water .
Воздух не загрязнен.
Леса и животные защищены.
Мусор не бросают в воду.
В зависимости от местоимения I am, you are, he is в настоящ времени, в прошедшем I was. you were he was
N1 one key + two keys=three keys. four cats -three cats=one cat. two keys + three keys=five keys. six cats+two cats= nine cats. со вторым думаю справится легко.