There are some people in the park 改为否定句

There are some people in the park 改为否定句 There are some apples in the park [改为否定句】 There are some flowers in the park.改否定句 there are some people near the gate 改为否定句 There are some flowers in the park.(改为单数句) there were some people in the street改为否定句 There are some students in the classroom (改为否定句) There are some clouds in the sky.改为否定句 改为否定句：There are some boats in the river. There are some plants in the classroom 改为否定句 改为否定句 There are some students in the classroom. There are some pencils in the box(改为否定句)