Answer:
See below
Explanation:
Remember that all "-ly" words are adverbs.
"Up" acts as preposition as well as an "adverb of place".
Suffixes are the ending words
See the attached file
16. Homeless. Homely
17. lasting. lastly
18. Upon. Up
19. Mournfully. Mournfully
20. Childish. Childishly
