由“助动词be + 动词的过去分词”构成。助动词be 有时态、人称和数的变化。 (1) 一般现在时：am/is/are +过去分词。如： Rice is grown in south China. 华南种植水稻。 (2) 一般过去时：was/were+过去分词。如： The glass was broken yesterday. 这块玻璃是昨天打烂的。 (3) 现在进行时：am/is/are being +过去分词。如： The project is being carried out. 这个计划正在执行中。 (4) 过去进行时：was/were/being +过去分词。如： This road was being built this time last year. 这条路去年这个时候还在修建。 (5) 一般将来时：will be +过去分词。如： The cars will be sent abroad by sea. 这些汽车将由水路运往国外。 (6) 过去将来时：would be +过去分词。如： The manager said the project would be completed by the end of the year. 经理说这个工程在年底前将会完成。 (7) 现在完成时：have/has been +过去分词。如： This novel has been translated into several languages. 这本小说已被译成了几种语言。 (8) 过去完在时：had been +过去分词。如： When I got to the theatre, I found the tickets had already been sold out. 我到达剧院时，发现票已卖完了。 本文来源：https://www.wddqw.com/doc/ba876179091c59eef8c75fbfc77da26925c59694.html