中考英语语法：现在完成时态(共16张PPT)

现在完成时 1. 现在完成时的基本概念和用法： 现在完成时由have/has +动词的过去分词构成。 规则动词的过去分词的构成与动词的过去式 相同，不规则动词的过去分词参阅本书附录II. 现在完成时可用来表示： 1. 过去发生的动作对现在造成的影响和结果。 它常常与already(已经), ever(曾经), just(刚刚), never(从未), yet(还，尚)等副词连用。 他们已经买了很多的东西。 They have already bought a lot of things. 他刚刚做好作业。 He has just finished doing his homework. 2.在过去开始的并持续到现在的动作或状态，它 往往和since或for构成的时间状语连用。 since用于某一特定的时间之前，而for用于 一段时间之前。 我学习英语已经有一年了。 I have learned English for one year. 我从去年开始学习英语。 I have learned English since last year. Mr Brown’s daughter has collected stamps ________ quite a few years. 2. The famous musicians have stayed in Shanghai ________ two weeks. 3. Has Mike ever been to the famous museum in London ________ he got to English? 4. Her husband has never been ill _________ he left hospital last winter. 5. I have been away from my home town _____ about five years. 6. Have you ever sent your TV set for repairs _______ you bought? for for since since for since 现在完成时的肯定式、否定式和疑问式： 我已经在这里工作两年了。 I h