Make the sentences interrogrative and negative. david is watching a football match. my friends are preparing for the picnic. alec collects music discs. he usually comes to the office at 9 oclock. the sportsmen are preparing for the competition.

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