Unit10Section A Grammar Focus-4c 课件2022-2023学年人教版八年级英语下册

Unit 10 I’ve had this bike for three years. Section A Grammar Focus Lead in 多长时间 三年 轨道火车 四岁生日 一段时间 三天以前 十小时以前 how long three years train and railway set fourth birthday a while three days ago ten hours ago Lead in 下个月 去年11月 去年 返回 家乡 希望做某事 明年 最古老的建筑之一 next month last November last year be back to hometown hope to do sth. next year one of the oldest buildings Objectives Master the new words and phrases. Do some exercises to consolidate the target language. The usages of for and since in present prefect tense. 1.Look at the sentences in the blanks，read them(3’) 2.Have a check.(2’) Self-learning How long have you had that bike over there? I've had it for three years. How long has his son owned the train and railway set? He’s owned it since his fourth birthday. Have you ever played football? Yes, I did when I was little, but I haven't played for a while now. Grammar Focus 表示从过去已经开始持续到现在的动作或状 态，可以和表示“从过去某一时刻延续到现在 的一段时间状语”连用，如“for+时间段”、 “since+过去时间点”、“since+过去时的从句”、 “since+一段时间+ago”。且for与since引导的时 间状语可以相互转换。 Present Perfect Tense 现在完成时 Exploration e.g. My uncle has worked at this factory for ten years. = My uncle has worked at this factory since ten year ago. I’ve lived here since 1990． 自从1990年以来我就住在这里。   I haven’t seen him for three years. 我三年没有看见他了。   含有for，since的现在完成时的用法歌诀: 过去的动作或状态，一直持续到现在，for、since 把时间带。 She’s been at this school since five years ago.   自从五年前她就在这个学校。   口诀 for与since都能与现在完成时连用，但区别较大： （1）for后须接“时间段” e.g. He has studied English for five years. 他学英语5年了。 （2）since后须接“时间点” e.g. He has studied English since 1999. 他从1999年开始学英语。 for 和 since 在现在完成时中的应用 （3）二者可以转换