train as (something)
1. To become educated in order to work in a certain professional role. I originally trained as a doctor, but I ended up teaching English in Japan. My brother has been training as a financial analyst.
2. To educate, coach, or prepare someone or an animal to work in some specific role. In this usage, a noun or pronoun is used between "train" and "as." We'd like to start training you as our new sales manager. These puppies are being trained as a guide dogs, so please don't pet them or feed them anything.
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