高一英语必修一一至五单元知识点_高一英语必修2单元知识点：Unit1
一、非限制性定语从句：
1. 让学生在课文中把含有定语从句的句子全部划出来，标上序号。
2. 提醒学生从句子的意义和形式方面进行对比，发现两种定语从句的不同点。
3. 同桌之间交换意见，对两种定语从句的不同点形成初步印象。
4. 教师引导学生对这些结论进行归纳分析，结合例句梳理两种定语从句的不同用法。
限制性定语从句
非限制性定语从句
表意
与主句语意关系紧凑，定语从句不能删除
与主句语意关系松散，定语从句拿掉其他部分仍可成立
功能
修饰先行词
修饰先行词或整个句子
形式
无逗号与主句分开
有逗号与主句分开
使用时可以用that引导
使用时不能用that引导
关系词做宾语可省
关系词做宾语不可省
as, which 引导的非限定性定语从句 as和which可代整个主句，相当于and this或and that。
As we know, smoking is harmful to one"s health.
The sun heats the earth, which is very important to us.
as 和which引导非限制性定语从句的不同：
(1)as 引导的定语从句可置于句首、句中和句尾，而which只能放在句末。
As is reported, a foreign delegation will visit the city.
(2)as有实际意义，可翻译成“正如，正像”而which并无实际意义。常见的搭配有：
as anybody can see 正如人人都能看到的那样
as is known to all 众所周知
as we had expected 正如我们所预料的那样
as is often the case 情况常常如此
as is hoped 正如希望的
Food prices finally went down, as people had expected.
(3)当定于从句是否定句或表示否定时，只能用which
He came here very late, which was unexpected.
Mr. Smith usually praises his student Rose in public, which she doesn’t like at all.
as 引导限制性定语从句
(1)常用于下列句式
1 Cultural Relics知识点" type="#_x0000_t75">such+名词+as… 像……一样,像……之类
the same+名词+as… 和……同样的
Such people as were recommended by him were reliable.他所推荐的人是可靠的。
I’d like to use the same tool as is used here. 我想使用和这里一样的工具。
注意：下面两句意思的差别
1 Cultural Relics知识点" type="#_x0000_t75">This is the same book as I read last week. 这和我上周读的那本书是一样的。(不是同一本)
This is the same book that I read last week.这就是我上周读的那本书。(同一本)
二、课文知识点
1. cultural relics 文化遗产
Many unearthed cultural relics were exhibited at the museum.
博物馆展出了许多出土文物。
2. rare and valuable 珍贵稀有
It is rare to find such a genius nowadays.
这样的天才现在很少见。
3. in search of 寻找，寻求 = in search for
He"s sailed the seven seas in search