I dunno what's come over the child," she moaned, tearfully.
I dunno what's got into you lately," Buddy declared, with a frown.
Gettin' her hair washed an' her finger nails cured an' I dunno what not.
I dunno what you're ravin' about," growled the unhappy owner of the automobile.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "dunno what" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.