人教版八年级下册英语unit6课件(阅读).ppt

1b.Listen. A reporter is talking to the participants in a skating marathon. Fill in the chart below. * collect shell marathon pair skate since Hilltop school raise several skater 收集；搜集 贝壳；壳 马拉松赛跑；马拉式活动 一对；一双 溜冰鞋 自从；自……以来 山顶学校 筹集；筹募 几个的；数个的 溜冰者 have / has是助动词 been是be的过去分词 表示从过去开始一直持续到现在的动作， 并有可能持续下去． 时态－现在完成进行时 （一） 构成形式： have / has been + Ving for +一段时间 have / has been + doing sth + since +过去的时间点 since + 从句 (一般过去时) 与过去时的比较： 1.I watched TV for three hours. 我看了三小时的电视． （我现在没有看电视了） 2.I have been watching TV for three hours. 我看了三小时的电视． （我现在仍然在看电视） 例句 1 我已经学了５年的英语了． I have been learning English for 5 years. 例句 2 他已经集邮10年了． He has been collecting stamps for 10 years. He has been collecting stamps since 10 years ago. He has been collecting stamps since 2002. 画线部分提问： How long has he been collecting stamps? 引导时间的介词for与since的区别 for since 表示时间的持续 for + 时间段 表示“自从过去某一时间点以来” since + 过去的时间点 强调一段时间 强调动作或状态 一直延续到现在 ( for与since引导的短语用how long提问 ) 从句 for five minutes ten days five years since May 1, 2003 8:00 he was seven years old seven years ago I started teaching English in 2010. I am still teaching English now. How long have you been teaching English? I have been teaching English for 2 years. Teach English 2010 Have been teaching English now 2 years Teach English 24 years old (Since I was 24.) sam started skating at 9 am. He is still skating now. How long has he been skating? He has been skating for 4 hours. skate 9 a.m Have been skating now 1 p.m 4 hours skate (since 9 o’clock.) Mary started cleaning at 7a.m. She is still cleaning now. How long has she been cleaning? She has been cleaning for 30 minutes. clean 7a.m Have been cleaning 7:30 a.m 30 minutes clean run 30 minutes 4 hours 3 hours 2 hours 1 hour A:How long has he/she been ………? B: He /she has been ……. for ………… Linda play soccer 45 minutes H