Sure! Here's the correct form of verbs in your sentences:
- The school announces a vote to decide on the location for the 7th grade class trip.
- Some vote for the zoo; others decide on the pumpkin patch.
- After the vote, the teachers announce that the pumpkin patch is the winner.
I used the correct forms of the verbs "announce," "decide," and "vote" to fit the context of the sentences. If you have any more sentences or need further assistance, feel free to ask!