Manner adverbs are adverbs like 잘 well; often, 많이 lots, a lot, and 자주 often which tell HOW you do something. In Korean, such adverbs like to park just in front of the verb. In cases of VERBAL NOUN + 하- , then, the adverb comes right before 하-:
- 수진씨는 공부를 잘 해요. [NOT 잘 공부를 해요.]
Sujin studies well. - 수진씨는 일을 많이 해요. [NOT 많이 일을 해요.]
Sujin works a lot.