第 2 课: 动词：走，跳舞，游泳，摔倒等；现在进行时-1

The boy is jumping. 那个男孩儿在跳

The horse is jumping. 那匹马在跳

The girl is jumping. 那个女孩儿在跳

The dog is jumping. 那只狗在跳

The boy is running. 那个男孩儿在跑

The woman is running. 那个女人在跑

The girl is running. 那个女孩儿在跑

The horse is running. 那匹马在跑