I am assuming that this question is asking you to correct this sentence. Here is the revised sentence: "You forgot that you took my blanket too."
They are giving credit to where ever they got their information.
Answer: They drew his chariot when Achilles left home for the Trojan War.
Explanation:
The horses, who were immortal, were given by Poseidon as a gift to Achilles's father Peleus upon his wedding to the goddess Thetis: magnificent racing stallions, gifts of the gods to Peleus, shining immortal gifts. Peleus then gave the horses to Achilles to draw his chariot when his son left home for the Trojan War.
Basically the next time Grendel tried attacking Heorot Hall Beowulf was waiting for him and then attacked him then while wrestling with the demon Beowulf ripped his arm off. Grendel was severally injured so he fled into the woods and died. <span />
