through which的用法
through在句子的成分？
through在句子的成分？
It is the channel through which all your personal power for success must follow.
这句话的意思是：正是通过这个管道， 所有你的个人力量都要流经出来。through 与 which 一起构成定语从句引导词， 表示通过这个（管道）。
定语从句什么时候不能用that？
★以下情况用which不用that.
(1)
当关系词前面有介词时，指物常用which.
The
prize
for
which
he
worked
so
hard
was
a
new
bike.
He
built
a
telescope
through
which
he
could
study
the
skies.
(2)
非限制性定语从句指物时，多用which.
Bamboo
is
hollow,
which
makes
it
light.
He
wrote
an
article,
which
tells
us
about
the
computer.
(3)
如果先行词本身是that时，只用which.
This
is
that
which
he
bought
yesterday.
(4)
which还有一种特殊用法，它可以引导从句修饰前面的整个主句，代替主句所表示的整体概念或部分概念。在这种从句中，which可以作主语，也可以作宾语或表语，多数情况下意思是与and
this
相似
which 引导的句子？
关系代词which引导的定语从句， 指物，在从句中可以作主语、宾语等。多数情况下，可与that互换。
但是要注意当从句中，介词提前只能用which，而且，在非限制性定语从句中，which引导的句子单独翻译为一句话。
(1)“The ability to guard customer data is the key to market value, which the board is responsible for on behalf of shareholders。”
考点：board董事会，be responsible for代表， on behalf of代表(注意在写作中的应用)，shareholder股东
解析：这个句子难度为低级，划横线部分为主句只有一个难点就是which的先行词是谁，是句子还是前面的一个名词，很显然，这个句子中是指市场价值，而不是这种能力。