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      has been 過去分詞是什么時態(tài)
      
            
            
      回答
      
            
      
                
                瑞文問答
                
      2024-08-03
            
      
            
      
                has been 過去分詞是過去完成進行時態(tài)。
      has：有; have 的第三人稱單數(shù)現(xiàn)在時形式。
      been：v. 曾經(jīng); 曾經(jīng)到過(某地)。
      are的過去分詞; be的過去分詞。
            
      
            
            
      擴展資料
      
            
      　　The system has been in operation for six months.
      　　這個系統(tǒng)已經(jīng)運行六個月了。
      　　The company has been investing in new plant and equipment.
      　　這家公司一直在投資購置新機器和設(shè)備。
      　　A new system has been devised to control traffic in the city.
      　　控制城市交通的新系統(tǒng)已經(jīng)設(shè)計出來。
      　　Digital television has been around for some time now.
      　　數(shù)字電視已經(jīng)面市一段時間了。
      　　A new advance has been made in the control of malaria.
      　　在控制瘧疾方面已取得新的進展。