Does is followed by has or have?

Answer 1

The verb does' is followed by have:

'Jo does have a new car'

Or:

'Jo has a new car'

Otherwise:

'Jo did have [had] an old car'

'Jo and Kim [do] have a new car'

'Does Jo have a new car?'

'Has Jo a new car?'

Answer 2

"Does" is followed by "have" for plural subjects and "has" for singular subjects in present perfect tense. For example, "He does have" and "They do have."