[译] 他能胜任做医生的工作。
[误] He qualifies to work as a doctor.

[正] He is qualified to work as a doctor.
[注] qualify 表示“使合格”，是及物动词，后面必须跟宾语。表示“使某人具有做某事的资格”，就应该说 qualify sb. to do sth.。