Confused about the verbs in this sentence
I'm teaching English and my students recently had a question about a sentence that has 6 verbs. They asked what was the verb and what was the subject. I tried to explain the sentence to them but it was really difficult and I found that I need some help too. Please tell me where the verbs are and which are partciples. If possible please explain the sentence to me too. "I can't change anything, so all it does is depress me." Thank you for your help.
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