Are there any languages in which adverbs (in the sense of verb modifiers) inflect to match the verb they modify?
1 Answer
Yes, there are supposed to be some languages that have adverbs that show inflectional agreement with the head verb. I don't know enough to give an overview, but one example seems to be Maori, where adverbs modifying a passive verb take passive marking, and those midifying a nominalized verb take nominalizing marking ("Formal Property Inheritance and Consonant/Zero Alternations in Maori Verbs", by Nicholas Kibre, October 1, 1998; p. 11).
yesterday I went to the store
vs.tomorrow I will go to the store
seems to meet your criteria.