that作连词和that作副词的用法小结精析精练
that作连词
that可以作连词引导各种名词性从句，包括宾语从句、主语从句、同位语从句和表语从句。
1). that作连词引导宾语从句（不充当任何句子成分，通常可以省略；并列宾语从句只有第一个从句的that可以省略。）
They have recommended （that） the site be closed and repaired. 他们建议将该处关闭并进行维修。
He said (that) he had finished his task and that he would not work extra hours. 他说他已经完成了任务不想加班。
2). that作连词引导主语从句 （不充当任何句子成分，在句首时不能省略；但用于形式主语句型时常可省略）
That you will win the medal seems unlikely. 你想获得奖牌看起来是不可能的。
It is obvious (that) we need more equipment. 很明显我们需要更多设备。
3). that作连词引导同位语从句（不充当任何句子成分，正式文体中不可以省略）
The idea that modern art can only be seen in museums is mistaken. 现代艺术只能在博物馆才能见到的想法是错误的。
4). that作连词引导表语从句（不充当任何句子成分，正式文体中不可以省略）
One problem is that I don't look any different from other people. 有一个问题是我看起来和其它人没有任何不同。
5). that还可以作连词引导结果状语从句，阅读时需要留意这个用法。
What was the matter with the fellow that he looked so happy? 那人怎么回事，看起来这样高兴?
背单词的好方法
随时随地背单词
不知不觉背单词
单词不用记
that作副词
that和this都可以作副词，用于修饰形容词或修饰另一个副词，表示“这么，那么，如此，这般”的意思，例如:
It's about that long. 它大约有那么长。
I am not that foolish.
Traditionally， robots have been hard， made of metal and other rigid material. But a team of scientists at Harvard University in the US has managed to build an entirely soft robot—one that draws inspiration from an octopus （章鱼）.
Described in science journal Nature， the “October” could pave the way for more effective autonomous robots that could be used in search， rescue and exploration. “The October is a minimal system which may serve as a foundation for a new generation of completely soft， autonomous robots，” the study’s authors wrote.
Robots built for precise， repetitive movements in a controlled environment don’t do so well on rough terrains
（地形） or in unpredictable conditions. And they aren’t especially safe around humans， because they’re made out of hard and heavy parts that could be potentially dangerous to their users.
So researchers have been working on building soft robots for decades. They’ve taken inspiration from nature， looking to animals from jellyfish to cockroaches， which are often made up of more flexible matter.
But creating a completely soft robot remains a challenge. Even if engineers build a silicone （硅酮） body， it’s still a grand challenge to construct flexible versions of essential parts， such as a source of power.
“Although soft robotics is still in its early stage， it holds great promise for several applications， such as search-and-rescue operations and exploration，” Barbara Mazola and Virgilian Mattel of the Italian Institute of Technology’s Center for Micro-Bio Robotics， wrote in a comment. “Soft robots might also open up new approaches to improving wellness and quality of life.”
12. What is the special feature of “October”？
A. Its soft. B. It’s made of metal.
C. It’s very small. D. It looks like an octopus.
13. What is the disadvantage of traditional robots？
A. they’re hard to control. B. they’re too heavy to move.
C. They can’t predict conditions. D. They can’t behave well all the time.
14. What is one of the biggest challenges to build a completely soft robot？
A. Its silicone body. B. Its complex components.
C. Its precise movements. D. Its flexible power source.
15. What can we infer from the text about the application of “October”？
A. It has not been put into widespread use.
B. It has been used in the field of rescue.
C. It has been used in various fields.
D. It has not been improved yet.
