Lesson48（课件）新概念英语第二册

lesson 48 Words pull push cotton wool collect collection nod meanwhile Question Why did the writer become very worried？ Dentists always ask questions when it is impossible for you to answer. My dentist had just pulled out one of my teeth and had told me to rest for a while. I tried to say something, but my mouth was full of cotton wool. He knew I collected match boxes and asked me whether my collection was growing. He then asked me how my brother was and whether I liked my new job in London. In answer to these questions I either nodded or made strange noises. Meanwhile, my tongue was busy searching out the hole where the tooth had been. I suddenly felt very worried, but could not say anything. When the dentist at last removed the cotton wool from my mouth, I was able to tell him that he had pulled out the wrong tooth Homework 复习课文重点单词，词组 复习本课中所出现的中考考点 预习49课 听读课文，并背诵 Dentists always ask questions when it is impossible for you to answer. 这里it是形式主语，真正的主语是to answer。 impossible通常不以人作主语，而以不定式或从句作主语 e g: It is impossible for him to help you. =It is impossible that he will help you . 1.meanwhile adv. 同时 meanwhile=at the same time=in the same time 用法和however一样，不能连接两个句子，但是意思上有承接概念 2.系表结构 系表结构有两部分构成：连系动词和表语。 连系动词分为三类：be 动词，感官动词，趋势动词。 1) Be 动词：am, is, are, was, were 2) 感观动词：sound, look, keep, taste, feel, smell 3) 趋势动词：appear, become, grow, get, turn, seem, remain, go 并列连词（是用来连接同等的词，词组或分句） 常用的有and, but, or, so, for, not only...but also..., either...or..., neither...nor... 。 1、and 和or用在祈使句中： 　and =if you...，you'll...; or=if you don't...， you'll...例如： 　Get up quickly and you will be there on time. 　= If you get up quickly, you will be there on time. 　如果你迅速起床，你就可以按时到那。 Get up quickly, or you'll be late for school. 　= If you don't get up quickly, you'll be late for school. 　如果你不迅速起床，你就会上学迟到。 2.当either...or..., neither...nor..., not only...but also ... 连接两个主语时，其谓语动词要与靠