Say it in different way. 1 we didn't meet anybody in the street. 2 the boy didn't watch anybody on tv yesterday. 3 the tourist didn't see anything interesting in the city centre. 4 there wasn't didn't funny in his words. 5 they didn't tell us anything new. 6 my friends didn't have anything to do yesterday evening. 7 molly doesn't cook anything for her family, her sister does it. 8 mr richardson didn't take anybody to the zoo in the morning
2. The boy watched nobody on TV yesterday
3. The tourist saw nothing interesting in the city centre
4. There was nothing funny in his words
5. They told us nothing new
6. My friends did nothing yesterday evening
7. Molly cooks nothing for her