Final answer:
The future tense forms of the given sentences are: We will write in exercise books, The train will stop at the station, He will decide what he wants to do, They will practice in the football field, Rats will multiply very fast.
Step-by-step explanation:
1. We will write in exercise books.
2. The train will stop at the station.
3. He will decide what he wants to do.
4. They will practise in the football field.
5. Rats will multiply very fast.
Learn more about future tense forms of verbs