In as much as the waves are high， I shall not go out in the boat.
4．结果状语从句，其关联词有： that， so （that）， such that， with the result that 也可引导结果状语从句。结果状语从句都置于主句之后。
I was in the bath， with the result that I didn’t hear the telephone.
5．程度、范围状语从句，其关联词有：so （that）， such that， as far as， as long as， to the degree that， in so far as 等。
6．目的状语从句，关联词有：so， so that， in order that等。此外，lest和in case也可以引导目的状语从句，但是含否定意义，意为“以免”或“以防”。lest引导的从句常用should、would、might等虚拟式谓语，只用于书面语，在口语中常用in case代替。
A police stands on the street in case someone would break the traffic low.
7．条件状语从句，条件有真实条件和非真实条件两种。引导条件状语从句的关联词有： if， unless， suppose， supposing that， assuming （that）， provided （that）等。
If you want to use a particular printer with your Mac OS， you must have theright chooser extension for that printer in the extensions folder when the computer is turned on.
Assuming that you know the weight and the specific gravity of a body， you cancalculate its volume.
8．让步状语从句，关联词有although， if， even though， when， while， whereas， granting/granted that， admitting （that）， for all （that）， in spite of the fact that 等。可以位于主句前或主句后。此外，疑问词＋ever 构成的复合词和 whether...or 也可以引导让步状语从句，具有“不论”或“不管”的含义。
Although “select” is often used instead of “choose” to describe the same action，“choose” is the preferred term because “select” has specific connotations within computing.
9．方式状语从句，其关联词有as， as if/ as though， just as， the way， how等。
A modern can be an internal device that is located inside the base unit， or， as shown in the figure， an external device that attaches to the base unit via a cable.
六、定语从句
1．在英语中，放在名词或代词或相当于名词作用的结构后，修饰或限制前面名词结构的从句是定语从句，也称为形容词从句。
引导定语从句的关系代词有：who，在从句中作主语、表语，whom，在从句中作宾语，whose，在从句中作定语，先行词为表示人、物的名词；which，在从句中作主语、宾语、表语或定语，其先行词为表示事物的名词；that，在从句中作主语、宾语、表语或定语，其先行词为表示人或表示物的名词。关系代词在从句中作主语，不可以省略；若在从句中充当宾语，大多数情况下可以省略。
定语从句分为限制性定语从句和非限制性定语从句。
引导定语从句的关系副词有：where， when， why， how 和that。其先行词分别为表示地点、原因、方式、方法等的名词。关系副词在从句中充当状语。That不能引导非限制性定语从句；what也不能引导非限制性定语从句；which引导非限制性定语从句时，其先行词可能是整个主句，或主句的一部分，从句中的谓语动词只能用单数形式。
限制性定语从句必须紧跟其先行词，但如果先行词后还有其他定语（名词短语，或介词短语，或非谓语动词短语）而且主句的谓语又很短，那么该限制性定语从句可与它所修饰的词分隔。如：
The time will certainly come when we shall need a great increase in transoceanic electronic communication.
对跨洋电子通信需求大大增加的时代必然会到来。
在计算机英语中，介词＋which/whom 引导的定语从句较为常见。其中介词都是从句本身所需要的，不可缺少；关系代词which 或 whom也不能省略。
（1）When you select the Minimal option， you can also perform a custominstallation in which you pick and choose the components that you want to install.
（2）To divide one number by another is a simple concept that we express in a couple of symbols， but to a computer， the same task takes dozens of smalloperations.
（3）A local network within an academic department will have a router that connects to the campus-wide network， which in turn will have a router or gateway toa regional network.
2．as的引导定语从句
（1）在such...as...中，as是关系代词，引导定语从句，as在从句中作主语、宾语或表语。如：
We will give you such data as will help you in your book.
We hope to get such a tool as he is using.
（2）在...such as...中，such 是代词，是as的先行词；as是关系代词引导定语从句。如：
This software is not such as I expect.
I will explain this program to such as would like to know it.
（3）在the same...as...中，same是形容词，as是关系代词或关系副词，引导定语从句。如：
I’d like to use the same computer as is used in your workshop.
We repaired the machine in the same way as they did.
（4）在as many/much...as...中，as是关系代词，引导定语从句。如：
As many instruments as are in the laboratory have been made most use of.
（5）当先行词不具体时，可用关系代词as引导定语从句；as代替整个主句，并在从句中作主语、宾语或表语。而且，类似的结构很多，已经形成习语。如：
as has been said before...
as is often the case...
as we know
as you can see...