现在完成时课件(方案A)

haven’t seen each other since 1998. ?自从1998年他们就没再见过面。Р过去分词的构成分为规则变化和不规则变化两种:Р规则变化: ?a) 一般情况下,在动词后直接加ed, 如play---played,?work---worked,water---watered, finish---finished等;?b) 以“辅音字母+ y”结尾的动词, 把y 变成i 再加ed, carry--?-carried study---studied等;?c) 以一个辅音字母结尾的重读闭音节的动词要双写最后?一个辅音字母,再加ed 如: stop---stopped,shop---??shopped等。Р不规则变化:见不规则动词表点击→不规则动词表Р练习1:Р写出下列动词的过去分词:Аput--- hear--- come---Аmake--- hurry---?watch---Аswim--- be--- talk---Аwant--- study---?stop--- Аtake--- see--- like---Р练习2:Р按要求改写下列句子:А1)?We have visited the museum. (改为一般疑问句)А2)?They have seen the film. (改为否定句)А3)?He has returned the book. (对划线部分提问)А4)?Jenny has already had her lunch. ??(改为一般疑问句并做否定回答)Р在熟悉了现在完成时的基本用法,基本句型以及过去分词的构成后,下面给同学们介绍一下现在完成时在运用时常出现的几种情况:?现在完成时的运用(1):? 1.在表示“用法1”时,现在完成时常和副词already, yet, never, ever ,before ,just等连用。.