prep.

1. 沿着；顺着
   I was driving my car along a muddy path.

   我沿着泥泞的小路开车。

ad.

1. 向前
   He sang loudly as he walked along.

   他边向前走边大声唱着歌。

2. 一起；带着[（+with）]
   Come along with us.

   跟我们一道去吧。

3. 来到；去到
   I'll be along in a minute.

   我一会儿就来。

prep.

adv.

1. moving in a constant direction on (a more or less horizontal surface).
2. used to refer to the making of progress.
3. extending in a more or less horizontal line on.
4. in or into company with others.