Present perfect (since, for, yet, just, never, ever) Present perfect (since, for, yet, just, never, ever)
U2 song: I still haven't found what I'm looking for. U2 song: I still haven't found what I'm looking for.
Success + Present Perfect Simple vs. Present Perfect Continuous Success + Present Perfect Simple vs. Present Perfect Continuous
Present Simple, Present Continuous, Present Perfect Present Simple, Present Continuous, Present Perfect