你好.是的,是时间状语从句.连接词是whenever.

When it rains,l go to school by bus=== I go to school on rany days.------on rainy days修饰I go to school.I practise the piano whenever I can怎样改成简单句，whenever还是连接副词吗，连接副词适用范围呢I practise the piano whenever I can改成简单句:I practise the piano at any time possible.