Make the sentences interrogrative and negative. david is watching a football match. my friends are preparing for the

* 1. David is watching a football match. Is David watching a football match? David is not watching a football match. 2. My friends are preparing for the picnic. Are my friends preparing for the picnic? My friends are not preparing for the picnic. 3. Alec collects music discs. Does Alec collect music discs? Alec does not collect music discs. 4. He usually comes to the office at 9 o\'clock. Does he usually come to the office at 9 o\'clock? He doesn\'t usually come to the office at 9 o\'clock. 5. The sportsmen are preparing for the competition. Are the sportsmen preparing for the competition? The sportsmen are not preparing for the competition.