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    has been 過去分詞是什么時(shí)態(tài)
    
            
            
    回答
    
            
    
                
                瑞文問答
                
    2024-08-03
            
    
            
    
                has been 過去分詞是過去完成進(jìn)行時(shí)態(tài)。
    has：有; have 的第三人稱單數(shù)現(xiàn)在時(shí)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(kuò)展資料
    
            
    　　The system has been in operation for six months.
    　　這個(gè)系統(tǒng)已經(jīng)運(yùn)行六個(gè)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(jī)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(jì)出來。
    　　Digital television has been around for some time now.
    　　數(shù)字電視已經(jīng)面市一段時(shí)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(jìn)展。