peter had always been interested in plants是什么时态,always为什么要放在这个位置

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peter had always been interested in plants是什么时态,always为什么要放在这个位置

peter had always been interested in plants是什么时态,always为什么要放在这个位置
peter had always been interested in plants是什么时态,always为什么要放在这个位置

peter had always been interested in plants是什么时态,always为什么要放在这个位置
这句话是过去完成时态
always 的位置是正确的,即:助动词后,实义动词前
这句话中,助动词是 had ,实义动词是 be 的过去分词形式.