Respostas
1) a) negative form: i can't go to the grocery tomorrow.
interrogative form: i will go to the grocery tomorrow?.
b) negative form: i think my brother can't come to the party tonight.
interrogative form: my brother will come to the party tonight?.
c) negative form: my mom and my dad don't start English next year.
interrogative form: my mom and my dad will start English next year?.
d) negative form: don't will snow next week.
interrogative form: it will snow next week?.
2) a) we will save the planet.
b) tomorrow the sun will shine again.
c) my brother will visit me next year.
3) a) when i am older i will have kids.
b) when i am older i will buy a house.
c) when i am older i will go to a Europe.
d) when i am older i will help other people.
espero ter ajudado :)