do-support
use of the auxiliary verb do, including its inflected forms does and did, to produce negated clauses and questions as well as other constructions in which subject–auxiliary inversion is required
en-GB/dəʊ - səˈpɔːt/
en-US/ˈdoʊ - səˈpɔɹt/
use of the auxiliary verb do, including its inflected forms does and did, to produce negated clauses and questions as well as other constructions in which subject–auxiliary inversion is required