He is utterly incompetent at his job.

他完全不能胜任他的工作。

The journalist slanted the report so that the mayor was made to appear incompetent.

那位记者做报道好让市长显得能。

He is a total incompetent.

他是个全用处的人。;他是一个毫能力的人。

He was incompetent yet hardworking.

他能力较弱,但工作还是勤勤恳恳的。

He’s incompetent,he’ll have to go.

他不称职,得辞掉他。

He was dismissed as incompetent.

他被认为能而遭辞退。