prep.沿着；顺着
adv.向前；一起
We walked along the road. 我们沿着路走。
The procession passed along the street. 游行队伍沿着街道前进。
You can go straight along this street to the traffic light. 你可以顺着这条街一直走到红绿灯处。
He walked along the mountain ridge. 他顺着山脊走。
用作副词 (adv.)He sang loudly as he walked along. 他边向前走边大声唱著歌。
You can take the letters along with the newspapers. 秘书把信和报纸一起拿走。
John brought his friends along. 约翰带他的朋友一起去。
作为介词时，与名词road，river，corridor，line等连用，常指那些有这细长外形的名词。 I saw her running along the road.
涉及到时期或活动时，常用through，如through the centuries（NOT along the centuries）和all through the journey（NOT all along the journey）。
adv.(副词)along用作副词的基本意思有二:一是“向前,往前”，常用在运动动词之后以加强其效果; 二是“一道,一起”，可用于人，也可用于物。用于美式英语还可指“接近”; 引申可指“在这里〔那里〕”。along通常和动态动词搭配使用。
along用作副词时不用于比较等级。
