買って行って来て上げる

[healer]

I guess one can say 買って行って来る to mean “go to buy and come back”

Can one say 買って行って来て上げる/くれる/もらう？

 

[Toritoribe]

Auxiliary verbs (verbs that is attached to the -te form of verbs) are usually written in hiragana.

～てくる can mean "to go somewhere to do something and then return", so just 買ってくる has that meaning. When 行く is used with this expression, the form should be 買いに行ってくる or (location に)行って、買ってくる. There is no problem with 買いに行ってきてあげる/くれる/もらう or 行って、買ってきてあげる/くれる/もらう, of course..

 

[healer]

Thanks a lot, Toritoribe-san.

I had supposed the ～てくる here actually used to mean 来る to come unlike おく where it doesn't mean 置く to place, so I didn't take てくる as an auxiliary verb.

買いに行ってきてあげる

So both きて and あげる here are auxiliary verbs, aren't they?

 

[Toritoribe]

Yes, that's right.