Yes - really problematical. The above link is very helpful. There is a huge amount of material to learn here without any seemingly easy way to learn it. For me I found it helpful just to appreciate the concept that a verb could govern the use of these little words. Anyone know how this sort of stuff is taught to Italians? Are there any rhymes or mnemonics to help? Simple rules to follow? Or is this just a question of being familiar with the language and something that can only come with time??