This is expressed idiomatically using the phrase 'e' qa' "it replaces...", made of the pronoun 'e' "that" and the verb qa' "replace":

'awje' vItlhutlh; HIq vItlhutlh 'e' qa'
"I drink root beer instead of liquor"
(literally: "I drink root beer; it replaces that I drink liquor").

jIQam; jIba' 'e' qa'
"I stand rather than sit" or " I'll stand instead of sitting"
(literally: "I stand; it replaces that I sit").

In everyday speech, shortcuts are often taken:

'awje' vItlhutlh; HIq ('e') qa'
"I drink rootbeer instead of liquor"
(literally: "I drink root beer; it replaces liquor").

Or in response to the question HIq Datlhutlh DaneH'a'? , one might say simply 'awje'; HIq ('e') qa' "rootbeer instead of liquor" (literally: "root beer; it replaces liquor").

In the last two examples, the use of the pronoun 'e' is optional. It's grammatically not needed, but because of the common use of the 'e' qa' construction, it's sometimes heard anyway.