Unit 8Have you read Treasure Island yet?Section A 3a-Grammar FocusHave you read these books?雾都孤儿汤姆 索亚历险记语法点拨现在完成时含义结构过去分词变化标词1.过去分词构成规则变化同过去式的规则1. 一般情况下，在动词词尾后，直接加“ed” work—worked—worked2. 以不发音字母“e”结尾的动词，在词尾加“d”。 live—lived—lived。（有e加d）3. 重读闭音节结尾，末尾只有一个辅音字母，双写这 一辅音字母，再加“ed”。 stop—stopped4. 以“辅音字母+y”结尾的动词， 改“y”变i，再加“ed” study—studied—studied。不规则变化需要熟读记忆build built builtfind found foundmake made madebring brought broughtlose lost lostcut cut cutteach tought toughtbe was/were beenread read read现在完成时动词构成：have /has + v 过去分词助动词否定haven’thasn’t疑问Have you…?Has he…?4.与下列时间状语连用：just , already, yet,ever, never, before, several timesalready “已经” ; yet “仍然, 还”， 其中already用肯定句, yet用否定句和疑问句中。2.现在完成时定义：表示过去发生或已经完成的某一动作对现在造成的影响。I have just had my breakfast.过去发生的动作一直延续到现在，而且有可能继续延续下去。 I have lived here for three years/ since 2013.一般疑问句： have / has … ? Yes, I/they have. No, I/they haven’t. Yes,he/ she has. No, he/she hasn’t. 肯定句： have / has（not） + 动词的过去分词3.现在完成时结构：---Have you read Robinson Crusoe yet?---Yes, I have.---No, I haven’t.---H |
