英语语法 The counter of the sink has many grooves al

水槽的台面（The counter of the sink）有许多槽（grooves），水可以沿着槽流下去。

The counter of the sink has many grooves (along which the water will run off).

本句主语The counter of the sink，谓语has ，宾语many grooves 。along which the water will run off是定语从句，修饰grooves.

将本句分为两句话：

The counter of the sink has many grooves. The water will run off along the grooves.