He is utterly incompetent at his job.

他完全不能胜任他工作。

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

那做出歪曲报道好让市长显得能。

He is a total incompetent.

他是个全用处人。;他是一个毫能力人。

He was incompetent yet hardworking.

他能力较弱,但工作还是勤勤恳恳。

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。