Lately I find pronouns and ellipsis more and more confusing.
For example Gmat Pill
says "I weigh more than him" is a correct answer choice, whereas I read on various boards that if I compare a pronoun to a subject, I need a subject pronoun. Hence, "I weigh more than he" or "I am taller than he" Btw, is it critical to say "I weigh more than he does
Second, the way Gmat handles ellipsis is a joke. I can see no rule whatsoever. MGMAT says an ellipsis is only ok, if you can sub in the exact same words in the exact same order.
For example, "I have eaten more than I ever will [eat]" is wrong, because eat is not equal to eaten.
On the other hand, the sentence "I walk as fast as [I walked] when I was a young" is apparently correct, although walk and walked are not in the same tense.
These two issues are beyond annoying as I've tried to see a clear rule for weeks now.... The more I research the less clear it gets.
Thanks for help. Are there any clear rules about this?