patients who lived in urban areas and had known hypertension.這句話中為什么用had known表示“診斷為，不需要加be嗎？

had hypertension. 患有高血壓病。known為hypertension的定語，已知的。并非hand known過去完成時態(tài)，與被動語態(tài)也無關(guān)。

邏輯、邏輯、邏輯！！！