go through the motions

to do something without thinking it is very important or having much interest in it

装装样子;敷衍了事

He says he's been investigating my complaint, but I feel he's just going through the motions.

他说他一直在调查我的投诉，可我觉得他只是在敷衍了事。

He claimed that he was looking for a job, but he was really just going through the motions.

他声称他在找工作，但其实只是走过场而已。