Unit 8Have you read Treasure Island yet?Section A Grammar Focus现在完成时态 Present Perfect TenseGrammar Focus现在完成时： 结构： 主语+ have / has + 动词的过去分词一般疑问句： have / has … ? Yes, I have. No, I haven’t. Yes, she has. No, she hasn’t. 现在完成时1.过去发生的动作对现在造成的影响或结果。和already，never,ever,just,before,yet等状语连用。2.过去已经开始，持续到现在的动作或状态，与for或since引起的一时间状语连用。动词构成：have/has+v过去分词have breakfastI have just had my breakfast.(现在我不饿)I’m not hungry nowmoved herein 2004I still live hereI have lived here for three years.I have lived here since 2004/three years ago. nowpast●现在完成时的用法:(1)表示过去发生或已经完成的某一动作对现在造成的影响或结果。I have already read Treasure Island.I have returned the book to the library.I have bought a new house.●现在完成时的时间状语: (1) 用副词already和yet。already一般用肯定句中, yet一般用否定句和疑问句中。We have already finished our homework. We haven’t finished our homework yet. Have you finished doing your homework yet?(2) 用ever和never。多用否定或疑问句中,表示“曾经”或“从未”等。 —Have you ever been to the Great Wall? ? 你曾经去过长城吗？ —No, I have never been to the Great Wall. ? 不, 我从未去过长城。 No, never. 不， 从来没有。●现在完成时的时间状语: (3) 用副词just和before |
