1) 'Sit wherever you like'
2) = Sit any place where you like.
3) He gets lost wherever he goes
4) = He gets lost at any place where he goes.
The above examples are from my two different grammar books and quite confused about sentence 4). I think there needs no 'at' in this sentence since where is an adverb.
So the correct sentence might be 'He gets lost any place where he goes'
Am I right?
"He gets lost anywhere he goes"
I hope it's clear.
You seem to be a little confused about grammatical terminology. 'Wherever' as used in your examples above is a conjunction.
It would, however, be a concessive adverb in
Wherever you may like to go, I still prefer it here.
and a (nominal) relative adverb in
Wherever you want to go is fine by me.