表达过去某个时刻正在做的事情 第一人称单数 我当时正在做 I was doing 第二人称单数和复数 你当时正在做 You were doing 第三人称单数 她当时正在做 She was doing 他当时正在做 He was doing 它当时正在做 It was doing莉莉当时正在做 Lily was doing 吉姆当时正在做 Jim was doing 那只狗当时正在做 The dog was doing 第一人称复数 我们当时正在做 We were doing 第三人称复数 他们当时正在做 They were doing 那些女孩们当时正在做 The girls was doing 那些男孩们当时正在做 The boys was doing 那些狗当时正在做 The dogs was doing |