(
课件网) Celebrations 现在完成时 Present Perfect Tense 现在完成时结构 01 过去分词的变化规则 02 现在完成时的时间状语 03 延续性动词和非延续动词 04 CONTENTS 目录 01 PART 现在完成时的结构 present(now) future past Present Perfect Tense 现在完成时 主语 + have/ has + 过去分词（pp） 现在完成时的结构 Winter has already come， will it still be far in spring 主语 + have/ has + 过去分词（pp） 否定形式 haven’t ( have not ） +过去分词 hasn’t ( has not ) +过去分词 疑问句 把助动词 have / has 放在句首 现在完成时的结构 注：主语若是第三人称单数助动词用 has 区别have 和 has的用法 You have planted all the trees. I have planted all the trees. He/She has planted all the trees. They have planted all the trees. 主语若是第三人称单数助动词用 has 02 PART 过去分词的变化规则 过去分词 1、规则变化（过去分词与过去时变化规则一样） (1) 一般动词，在词尾直接加“ed”。 work--worked--worked visit--visited--visited (2) 以“ e ”结尾的动词，只在词尾加“d”。 live--lived (3) 以“辅音字母 + y ”结尾的动词，将 “y” 变为 “i”， 再加“ ed ”。 ， study--studied--studied cry--cried--cried (4) 重读闭音节结尾，末尾只有一个辅音字母， 先双写该辅音字母，再加“ ed ”。 stop--stopped--stopped drop--dropped--dropped 2、不规则变化 have—had—had am/is —was—been are—were—been do—did—done go—went—gone see—saw—seen Present perfect tense 现在完成时 构成: 用法一： have/has + 过去分词 表示过去发生的某一动作对现在造成的影响或结果.现在完成时,强调是过去动作与现在的联系,也就是强调现在的影响和结果. 1.两个句子都表示过去发生的事； 2.现在完成时强调过去和现在的联系，不能和具体的时间状语连用； 3.一般过去时强调过去发生的事或状态,没有说明与现在的关系，它与表示过去的具体时间连用。（last, ago, yesterday, etc. ） present past I have lived here for two years I lived there 2 years ago 03 PART 现在完成时的时间状语 现在完成时不能与表示过去的时间状语连用，常与之连用的时间状语有： before, by now (so far), once, twice…, just, recently yet(否/疑), already(肯), ever, never, all one’s life , in /during/over the past /last 5 years, （1）already 肯定句: “己经” 一般疑问句: 句末(表示惊讶的语气) “难道” Have you had breakfast already？(表示强调) I’ve already had breakfast. (常见) = I’ve had breakfast already. 注: 有already的句子在时态上并不都是现在完成时，判断时要看该词后是否有动词的过去分词。 e.g.: She’s already eighty years old. It was already very late. (2) yet 否定句:句末 “还(没)” 疑问句: 句末 “己经” Have you had breakfast yet I haven’t had breakfast yet. 注意：当在肯定句中含already或just，变否定时，在句末加yet。 I haven’t seen the film yet. ● Mother has just cleaned the house. Mother hasn’t cleaned the house yet. ● I have already seen the film. (3) ever 肯定句/疑问句 : 句中 “曾经” I’ve ever been to Beijing. Have you ever been to Beijing (4) never 否定句: 句中 “从来没有” I’ve never been to Beijing. 注: 带ever的肯定句变否定句时, 将ever变never He has ever made meal. Have they ever travelled by train No, never. He has never made meal. ... ...
