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4.过去进行时 概念: 表示过去某一时刻或某一段时间正在进行的动作. 这一特定的过去时间除了有上下文暗示外,一般用时间状语来表示. 如: 1) ---What were you doing? ---I was jumping. 2) ---What was the boy doing when the UFO arrived? ---He was sleeping. 构成: 主语 + 助动词be(was/were) + 动词-ing形式构成. (责任编辑：admin) |
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4.过去进行时 概念: 表示过去某一时刻或某一段时间正在进行的动作. 这一特定的过去时间除了有上下文暗示外,一般用时间状语来表示. 如: 1) ---What were you doing? ---I was jumping. 2) ---What was the boy doing when the UFO arrived? ---He was sleeping. 构成: 主语 + 助动词be(was/were) + 动词-ing形式构成. (责任编辑：admin) |