for/after

[amiable25]

Hello, I have a question.
1.Put the pasta in an oven ( ) 15 minutes.
2. We have some snacks ( ) playing outside.

The answer is 1. for 2. after. But is it possible if I change the answers into 1. after 2. for? Or are ther any other options? (other possible prepositions?) Thank you.

 

[jutfrank]

It depends what you mean by 'possible'. It's grammatically possible to make the changes you suggest, yes, but it would be very wrong to do so because you would be changing the meaning of the sentences from that which was intended by the person who wrote them.

Do you understand what the sentences (with the correct answers) mean?