内容正文:
Unit 1
Reading 1
The evolution of video and sound devices
高中英语 选择性必修(第二册)
Unit 3 Fit for life
Learning aims:
By the end of this class, you will be able to:
Learn to identify the structure of articles;
Learn to analyze long and complex sentences;
Learn to use sentence patterns and get much writing practice.
2
Pattern1 教材P31
Genome editing, serving as a new weapon in the fight against diseases, will lead to a fundamental change in our approach to health care.
基因组编辑作为对抗疾病的一种新手段,将使我们的医疗保健方法发生根本性的变化。
句式剖析:
本句是一个简单句。______________是主语,现在分词短语 serving as a new weapon in the fight against diseases 在句中做________,修饰主语,相当于定语从句 which serves as...diseases
Genome editing
定语
考点提炼:现在分词(短语)做定语
(1)形式:现在分词做定语时,只能用doing和being done两种形式。
(2)意义:doing表______________________________。being done表示被动、动作正在进行。
(3)位置:单个的现在分词做定语时,通常放在被修饰词之前;现在分词短语做定语时,通常放在被修饰词之后。
(4)扩展成句:现在分词短语做后置定语时可扩展成定语从句。
主动、动作正在进行或现在(当时)的状态
Don't wake up ___________________.
不要吵醒这个正在睡觉的男孩。(主动、动作正在进行)
Will the people ________________keep quiet?
= _________________)
坐在后面的人保持安静,好吗?(主动、动作正在进行)
The matter ______________is very important.
= __________________)
正在讨论的事情很重要。(被动、动作正在进行)
the sleeping boy
sitting at the back
(who are sitting at the back
being discussed
(which is being discussed
Pattern2 教材P31
Without them,genome editing could be as dangerous as a car out of control.
没有它们,基因组编辑可能会像失控的汽车一样危险。
句式剖析:
本句是一个简单句,句首的介词短语在句中做状语,句子的主语是genome editing,句子结构为主系表,表语中的“as dangerous as”属于“as+形容词+as”结构,是“和·····一样····”结构的一种具体形式。第一个as为副词,修饰形容词或副词的原级。第二个as为连词,引导状语从句,也可以为介词,其后接名词或代词。
考点提炼:as...as句型
“as...as...句型”是由两个as组成的,其中第一个as的词性是副词,词义是“同样地”第二个as来引出比较的对象,这个as的词性是连词,词义是“像…一样”
He is nearly _______________.他差不多和你一样高了。
Obviously, the boy doesn't work __________ many of his classmates.显然,这个男孩不像他的许多同学那样学习刻苦。
He doesn't play the piano ____________ his younger sister.
他没有他妹妹弹钢琴弹得好。
“as...as...句型”的省略
His room is as clean as[his room] could be.
他的房间像它本应该的那样干净。
My mind isn't as sharp in the afternoon as [my mind is] in