Unconditional

http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%206.htm

http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%205.htm

http://baladre.info/english/sedaviwebfront/presimpneg.htm

http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?04

http://www.carmenlu.com/first/grammar/present1_1whq.htm