Section Ⅱ Grammar——被动语态课前自主预[例句·体验]1．Some prepositions are omitted in American English.在美式英语中，一些介词被省略了。2．So far, the moon has been visited by man already.到目前为止，月球已被人类到访过了。3．A talk on Chinese history will be given in the school hall next week.下周，一场关于中国历史的讲座将在学校礼堂举行。4．A lot of things are being done by the doctors to save the little girl now.现在医生们在用尽一切方法救治那个小女孩。5．The monkey was seen to jump off the tree just now.刚才那只猴子被看到从树上跳了下来。6．How many trees had been planted by the end of last year?到去年年底，已经种了多少棵树？7．A nice picture was being drawn for our teacher at this time yesterday.昨天这个时候，正在为我们老师画一幅漂亮的画。8．Was the city built in 1880?这座城市被建于 1880 年吗？9．Will the food be sent to the homeless tomorrow?明天这些食物会被送给无家可归者吗？10．Has the girl been allowed to go out alone at night yet?那个女孩已被允许晚上独自外出了吗？课堂合作探究 [语法·讲座]1一、被动语态概述构成助动词 be＋动词的过去分词(be 动词有人称、数和时态的变化)用法(1)不知道动作的执行者或者没必要、不愿意或不便说出动作的执行者时(2)强调或突出动作的承受者或事件本身时①His bicycle was stolen yesterday.他的自行车昨天被人偷了。②Our classroom is cleaned every day.我们每天都打扫教室。③Some babies are being looked after by my mother.一些婴儿正由我母亲照顾。名师点津在被动语态中，经常带有“by＋动作执行者”，by 在此译为“被，由”。二、各种时态的被动语态形式一般现在时am/is/are done一般过去时was/were done一般将来时will/shall be done现在进行时am/is/are being done过去进行时was/were being done现在完成时have/has been done过去完成时had been done过去将来时would be done①English is spoken in many countries.很多国家说英语。②Some trees are being cut down in the park.公园里的一些树正在被砍倒。2③The construction of the new...
