Answer:
indicative to imperative
Step-by-step explanation:
An "indicative mood" is a type of verb mood which expresses the following: an opinion, a fact, a question, an assertion, etc. It is used to make a statement or ask a question. In the first clause, "The teacher suggested that everyone proofread their papers," the verb here is "suggested." This is in the indicative mood.
On the other hand, an "imperative mood" is a type of verb mood which expresses command. It is used to make an order to somebody. In the second clause, "turn in your paper afterward," the verb here is turn in and this is in the imperative mood. It orders that everyone will have to give their papers to the teacher after proofreading them.