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Answer:
2. Knocking
"I can hear someone knocking on the door."
Answer:
Reflexive verbs are formed with two main parts. The main verb is who is performing the action, and the reflexive pronoun is who the action is directed at. In the case of reflexive verbs, these will both refer to the same person. As you can see “levantar” is a regular -ar verb.
Explanation: