沿着

tā men yán zhe hé biān wǎng huí zǒu

他们沿着河边往回走。

They walked back along the riverside.

tā zhèng yán zhe gāo sù lù xíng shǐ

他正沿着高速路行驶。

He is driving along the motorway.

tā men yán zhe hǎi tān zǒu

他们沿着海滩走。

They walked along the beach.