'Instead' is properly placed. It gives such a sense as can be had from this sentence:
"She drank cofee but I took tea instead."
But, truly speaking, 'instead' is used more in the place of something mentioned earlier as___I was going to go shopping but I went dancing instead.
This is why Dan,for his squeamishness, is not ready to use it at all.
If, by any standard, I am asked to give the sentence a rendering, "INSTEAD" would be removed and the sentence will begin with 'whereas' or 'whilst on the contrary' or something more befitting.
Verbs like go, come, smile, and die are all intransitive, and intransitive verbs by their very definition are incapable of taking objects, be those direct or indirect.
Compare what happens with an actual transitive verb’s objects:
- I sang a song that night in the garden.
- I sang her a song that night in the garden.
The direct object in both cases is a song, the thing that receives the action of the verb sing. In the second case, her is the indirect object, the usually animate agent on whose benefit the action was made. Notice that no linking prepositions are required to connect the transitive verb to either of its objects; syntax alone coördinates these.
Most transitive verbs can be put into the passive voice by making the original direct object the logical subject of the inflected verb be and the (passive) past participle of the original verb:
- A song was sung that night in the garden, a song sung by me in my very best nightingale impersonation.
In your sentence,
You have an intransitive verb of motion, which rules out any possibility of a direct object. One cannot “go *something”, nor can one “go *someone *something”.
You can, however, have adverbial phrases described the location of this intransitive motion verb. So what you have here is the prepositional phrase to him serving as one possible sort of adverbial phrase to describe the direction of the motion. Him is the object of the preposition; it does not receive the action of the verb.
Similarly locative adverbial examples include:
- I go out the back door.
- I go down the street.
- I go from here to a far, far better place.
- I go there.
- I go home.
- I go to where he is.
- I go wherever he goes.
- I go anywhere I please.
- I go in a pee-bottle.
Best Answer
"When" is an adverb of time, referring to the verb "see" - In other words, modifies it.
In your example, it's an interrogative adverb, meaning "at what time".