2．Subordinate Conjunctions从属连词

a．The subordinate conjunctions are words used to join a dependent(subordinate)clause to an independent(main)clause in a complex or compound-complex sentence．The followingare frequently used as subordinate conjunctions:

从属连词用于连接主从复合句以及复杂句。下列的从属连词较为常用：

whom　after　as soon as　before

until　when　which　who

why　whose　although　because

that　what　where　while

All stuff stood up when the CEO stepped into the meeting room．

Please send us a replacement copy as soon as you can．

Do you know why they want to terminate the agreement?

The forms that we need are out of stock，and I don't know when they will be available．

b．When joining a dependent clause to an independent clause，always use a subordinate conjunction(when，because，before，and so on)．

主句与从句的连接必须使用从属连词，如when，because，before等。

Ms．Bennett often speaks too rapidly when she dictates to her secretary．

Please study the contract carefully before you sign it．