1. Are our customers from English-speaking countries?
Our customers aren't from English-speaking countries.
2. Was there a confidential document in that safe?
There wasn't a confidential document in that safe.
3. Must she know a foreign language in order to be a good secretary?
She mustn't know a foreign language in order to be a good secretary.
4. Does The Earth go round the Sun?
The Earth doesn't go round the Sun.
5. Is Alex getting married next month?
Alex isn't getting married next month.
6. Did the police stop me on my way home last night?
The police didn't stop me on my way home last night.
7. Did Tom wake up early yesterday?
Tom didn't wake up early yesterday
8. Have lots of things happened since I last wrote to you?
Lots of things haven't happened since I last wrote to you.
9. Will they have business talks tomorrow morning?
They won't have business talks tomorrow morning.
