PRACTICE... make negative sentences and questions...

• You have lost your mind.
• She knew the answer.
• The parents were surprised.
• Tim is going to throw a party.
• We are worried.
•  He will go to the party.
• People are mad.
•  Her children go to that school.
• The accident happened here.
• My students have to do a presentation.
•  She was absent on Tuesday.
•  We can't concentrate.
• They should practice.
•  I have an appointment on Friday.
•  She says no to everything.
• He plays three days a week.
•  The students did their homework.
•  Jim has visited Las Vegas.
• She wants to paint her room. 
• We have solved the problem.