I wanted ask, "Did she know him or know of him?"
I ended up asking,
"Did she know him or she knew of him?"
The second sentence as it stands sounds wrong. If I want to salvage the second sentence I might say, " Did she know him or did she know of him?" However, I want to know whether the second sentence is colloquially correct or not because we say, "She knew of him?" I joined the two sentences [1) "Did she know him?" and (2)"She knew of him?"] using a conjunction (or). Are we allowed to write sentences like the one in block-quotes? If not, please explain why?