第 91 课: 使用更多的动词：参加，戴，看等-2

I am jumping rope. The boys are holding the rope. 我在跳绳。这两个男孩儿在摇绳

We were jumping rope. 我们刚才在跳绳

I am drinking. 我在喝水

I was drinking. 我刚才在喝水

My sons and I are digging. 我和两个儿子在挖地

My sons and I were digging. 我和两个儿子刚才在挖地

I am climbing the ladder. 我在爬梯子

I have climbed the ladder. 我已经爬着梯子上去了