don't vai doesn't Jaa Sulje Harjoittele! http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_negation2.htm http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_negation_contracted.htm http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_negation_contracted2.htm