1、方式狀語從句通常由as, (just) as…so…, as if, as though引導。

1）as, (just) as…so…引導的方式狀語從句通常位於主句後，但在(just) as…so…結構中位於句首，這時as從句帶有比喻的含義，意思是"正如…"，"就像"，多用於正式文體，例如：　　

Please do as what I told you.　　請按照我告訴你的做。　　

As water is to fish, so air is to man. 　　我們離不開空氣，猶如魚兒離不開水。　　

Just as we sweep our rooms, so we should sweep backward ideas from our minds. 　　正如打掃房屋一樣，我們也要掃除我們頭腦中落後的東西。　

2）as if, as though 　　兩者的意義和用法相同，引出的狀語從句謂語多用虛擬語氣，表示與事實相反，有時也用陳述語氣，表示所說情況是事實或實現的可能性較大。漢譯常作"彷彿……似的"，"好像……似的"，例如：

He looks as if (as though) he had been hit by lightning. 　　他那樣子就像被雷擊了似的。（與事實相反，謂語用虛擬語氣。） 　　

It looks as if the weather may pick up very soon. 　　看來天氣很快就會好起來。（實現的可能性較大，謂語用陳述語氣。） 　　

說明：as if / as though也可以引導一個分詞短語、不定式短語或無動詞短語，例如：　　

He cleared his throat as if to say something. 　　他清了清嗓子，像要說什麼似的。　　

The waves dashed on the rocks as if in anger. 　　波濤衝擊著岩石，好像很憤怒。