For question 2, is there something wrong with what I did?

well trained → evolved → stronger in battle → excited trainers

/excited trainers → /stronger in battle → /evolved → /well trained

so:

/not well trained → /stronger in battle or even

/not well trained → /excited trainers

For Question 4, would the following be right?

chained:

visits crime scene → finds clues → makes useful deductions → solves any case

/visit crime scene → /find clues →/make useful deductions → /solve any case

conclusions:

visits crime scene → solves any case

/solve any case → /visit crime scene

I didn't flip it around when I negated it so I'm not sure if it's right. Or am I thinking too deeply about it?