These lines are spoken by a captain who has been wounded in the war. He is relaying the information about Macbeth's brave fight against the enemy to King Duncan. He talks about how brave and valiant Macbeth was, so the audience can infer that he is a fierce warrior who will stop at nothing to ensure his win in a battle.
So that you don't drift off from the topic and to make it nice and simple
Answer:
1. You didn't know
2. Teacher gave you extra time
3. Lost it
4. Teacher lost it