1. 用于本義，意為“與……一樣遠”“一直到……” (在否定句中也可用 so far as)。如：

We walked as far as the river. 我們一直走到河邊。

We didn’t go as [so] far as the others. 我們走得不如其他人遠。

I’ve read as far as the third chapter. 我已讀到第三章。

2. 用于引申義，意為“就……而言”“從……來看”“盡……所能”“只要”(有時可用 so far as)。如：

We’ll help you as far as is possible. 我們會盡可能幫你。

As [So] far as I know, that is highly unlikely. 就我所知，那是極不可能的。

As [So] far as I can see, there are no mistakes. 據我看 沒有什么差錯。