There is a plane in the sky.怎么改成否定句

There is a plane in the sky.怎么改成否定句 is,in,plane,the,there,sky,a 把There is a plane in the sky改成复数的句子 There is a bird in the sky 怎么改否定句 there is a pear in the basket.改成否定句 There is后+动词什么形式?比如：EG：There is a plane (fly)in the sky There is(a plane)in the sky.对括号内提问 walk on the grass.改成否定句怎么改?there is a park in our city.改为一般疑 There was a plane ___(fly) in the sky There is some rice in the bowl 改成否定句 There is some milk in the glass.改成否定句. There is an apple in the box.改成否定句