Student or Learner
A. Has Keith ever seen anyone jumping down from a building to kill himself or herself because of losses in business?
B. Did Keith see anyone jump down from a building to kill himself/herself because of suffering heavy losses in business?
Are these natural to say in conversations?
Thank you so much
As I native I wouldn't exactly say either of those sentences, rather something along these lines:
Has Keith ever seen anyone jump off a building because of losses in business?
EDIT: That isn't to say your examples are wrong, just as a native they seem a bit lengthy.
Yes, jump from or jump off. You don't jump down. Down takes care of itself.