beelected後面加什麼介詞

be elected 後面加介詞as，表示“被選為…，被選當…”之意，相當於be elected to be，二者可以互換，例如：

He was elected as chairman of the meeting.他被選為這次大會的主席（本句中，be elected後面加了介詞as，表示“當/是大會的主席”，此句可以替換為He was elected to be chairman of the meeting.）