新外研版八年级下册英语语法-现在完成时I Warm-up选择题。（）1. He often______his clothes on Sundays. A. washing B. washes C. has washed D. wash （）2. Next month______twenty five. A. has my sister B. my sister will be C. my sister shall have （）3. We will start as soon as our teacher______ . A. comes B. will come C. come D. is coming （）4. Last week John______his leg. A. felt and broken B. fell and broke C. feels and breaks D. fallen and broken （）5. It______ hard when I left my house . A. is raining B. rains C. was raining D. will rain II Grammar现在完成时（一）构成：1.肯定句主语（第一、二人称，第三人称复数）+have +过去分词 +其他主语（第三人称单数） +has+过去分词 +其他如： I have been to Beijing. 2.否定句3.主语+ have/has +not +过去分词 +其他如： He hasn’t finished his homework yet.4.一般疑问句Have/Has +主语 +过去分词 +其他？如： Has the letter arrived yet? 5.特殊疑问句特殊疑问词 +have/has +主语 +过去分词 +其他？如： Where have you been to ? （二） 用法：1. 现在完成时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。(汉语中常用 “已经”、“过”、“了”等表达 )通常与表示包括现在在内的时间副词just, already, before, yet, never, ever 等状语连用。例如：同步练习（ 1）① I have _______________________that before. (我从来没有听说过那回事）② Have you_____________________? （你曾经骑过马吗？）③ She ________________________the math exercises.（他已经完成了数学作业）④ I__________________________ book.. （我刚刚丢了历史书）2. 现在完成时表示过去已经开始， 持续到现在 ,也许还会持续下去的动作或状态。可以和表示延续的时间状语连用。如 for、since 等引导的时间状语。（注意：句中谓语动词要用延续性动词）一段时间的表达方法有两种: for: + 一段时间for a year, for two weeks, for three years 过去的某一时刻： since nine hours ago, since last week, since 1990 since 一般过去时态的时间状语从句：since...
