高中英语时态语态讲解课件(共37张PPT)

一般现在时： 表示经常性、习惯性的动作，也可用于陈述真理、客观事实。 When I was young, our teachers often told us that knowledge is power. 2. He often comes late. 3. The sun rises in the east and sets down in the west. 4. Practice makes perfect. 一般过去时： 是与“现在没有联系的时态”，只强调过去的事实，不强调与现在的关系；语境中的过去式常表示“刚才,曾经”之意，暗示现在已“不再这样”。表示对过去某时或某时期的动作或状态，或过去习惯的动作。 Your phone number again? I didn’t quite catch it. He wrote many plays when he was at college. 3. ---Nancy is not coming tonight. ---But she promised. 进行体： 它具有暂时性、持续性、未完成性的特点。 现在进行时： 表示此刻或现阶段进行的动作。 过去进行时： 用来表示过去特定的某一时刻正在发生或过去某一段时间内持续发生的事情。 进行体： ① 一个长动作作为背景，被一个短动作打断，长动作往往用进行体，短动作用一般体。如： My brother fell while he was riding his bicycle and hurt himself. The reporter said that the UFO was traveling from east to west when he saw it. ② 表示动作的未完性、暂时性。如： I don’t really work here; I am just helping out until the new secretary arrives. Selecting a mobile phone for a personal use is not easy task because technology is changing so rapidly. ③ 表示计划、安排要做的事。如： I’