2015-2016学年高中英语Unit4Wildlifeprotectionlearningaboutlanguage新人教版必修2.ppt

现在进行时的被动语态有肯定式、否定式、 一般疑问式及特殊疑问式四种结构，现分 述如下： 1. 肯定式：由“主语+am/is/are+ being+过去分词”构成,其中的am/is/are及being均是助动词，无任何词汇意义。 2. 否定式：由主语+am/is/are+ not+ being+过去分词构成。 The question is not being discussed at the meeting. I am not being helped at present. 3. 一般疑问式及其回答 由“Am/Is/Are+主语+being+过分？”构成，答语一般采用简略式，使用助动词am, is或are。 1) —Is the car being repaired? —Yes, it is. / No, it isnt. 2) —Are they being treated by the doctors ? —Yes, they are. / No, they arent. 1. 表现正在进行或发生的被动动作，常 与now, look等词连用。 He is being operated on in the hospital. Helicopters are being sent (by us )to rescue them now. 2. 表示现阶段或目前这段时间正在进行的被动动作，但这一被动动作在此时此刻不一定正在发生。 A new factory is being built. They are being taught English at present. 1. 注意助动词的运用。 现在进行时的被动语态有两个助动词，一是助动词be的相应形式，为现在进行时的助动词；二是助动词being，为被动语态的助动词，这两个助动词缺一不可，并且不可颠倒顺序。 这些动物目前正被放了出来。 The animals are being set free at present. 　　　3. 注意动词的性质。 有些动词，通常是不及物动词即表示某种情况或状态动词，如：appear, rise, die, happen, occur, lie, belong to, break out, take place, fit, mean, become, fail, consist of, look like 及cost 等不可用于被动语态。 完成下面的句子。 1. The news ____________ (被讨论) about everywhere. 2. A lot of tall buildings ___________ (建立), and people will move in next year. 3. Most of the streets in the city has been widened and many new buildings _______________. (重建) 3. 表示一种经常性或习惯性的被动行为，常与always, forever, continually, constantly等词连用，往往带有夸张、羡慕、赞扬、责备、厌烦及埋怨等感情色彩。 The naughty boy is always being scolded by his father. Tom is always being praised by the teacher. 4．与情态动词连用，表示对现在正在发生的被动行为的推测。 John is not here.　He must be being interviewed (2)—Do you know what smith is doing? —He is ill. He may be being examined by the doctor. 注意 2. 注意短语动语后面的介词不可漏掉。 有些动词短语如take care of, look after, talk about等，用于被动结构时，后面的介词不可漏掉。 The baby is being taken good care of. 4. 注意时间状语及上下文的含义。 现在进行时的被动语态一般不与表示一段时间的状语或表示次数的状语连用。　 I still don’t know what ___ while I was away. A. has happened