If we look at the word "give"
Present tense: give
Present continuous tense: giving
Past tense: gave
Past participle: given
Another example with the word "look"
Present tense: look
Present continuous tense: looking
Past tense: looked
Past participle: looked
with the word "see"
Present tense: see
Present continuous tense: seeing
Past tense: saw
past participle: seen
Using these three examples we may able to find the verbs from this passage.
"When I (looked) into the mirror, I (saw) that they (were) not fine. Now they (stuck) out from my head like two satellite dishes, and I (was) ( receiving ) more (signals) than ever".
All the words that are in bold and bracket are verbs.
"Was" or "were" are not exactly verbs, but they are helping verbs.