It is Sunday today. It is a fine day. Bob and Jane are in the park. It is a big park. It is a big park. They come here to have a rest after a week hard work and study. Some boys are playing chess(象棋)on the grass(草地). Some girls are singing and dancing. An old woman is reading a newspaper under a tree. A young man and his little son(儿子)are playing with a toy car. How happy they are.

阅读短文，判断正误。

他正在读书。

他们正在画画。

一般疑问句： 

肯定回答： 

否定回答：

她正在看电影。

我正在洗碗。

一般疑问句： 

否定句：