as far as       直到......為止

例:I have read as far as the third chapter.

~~~~~~~~~~~~~~~~

as long as      只要....; 以...為條件

例:As long as ypu remain here, you are under our protection.

~~~~~~~~~~~

as fast as      跟...一樣快

例: I can run as fast as you.

~~~~~~~~~~~

as soon as      一....就.....

例: I got up as soon as the alarm went off.

例: As soon as the fiscal year begins, we plan to recruit new staff members for the purpose of raising our productivity.