Past Participle-used as Attribute and Predicative规则动词的过去分词由动词原型加词尾-ed 构成。不规则动词没有统一的构成规则。例如：attend-attended suspect- suspected pollute-polluted write-wrote buy-bought catch-caught一.过去分词作定语 过去分词作定语有前置和后置两种情况 1、前置定语单个的过去分词作定语，通常放在被修饰的名次之前，表 示被动和完成的意义。a)被动意义The injured workers are now being taken good care of in the hospital.b)完成意义a retired teacher They are cleaning the fallen leaves in the yardI: Introduction过去分词是非谓语动词的一种形式，表示完成和被动的动 作。它在句子中可以充当表语、定语等成分。2、后置定语 过去分词短语作定语时，通常放在被修饰的名词之后，它的作用相当于一个 定语从句。如： This will be the best novel of its kind ever written(=that has ever been written) Who were the guests invited (=who had been invited) to your party last night? 二、作表语 过去分词作表语并无“完成”或“被动”之意，而是表示主语的状态或思想感情 等。例如： He looked worried after reading the letter. He seemed quite delighted at the idea.常见的作表语的过去分词有：connected broken closed astonished disappointed lost worried interested tired pleased surprised known注意：过去分词作表语不要与被动语态混为一体。分词作表语表 示主语的状态，而被动语态则表示被动的动作。例如；My glasses were broken by my daughter.(动作)On the earth,70% of the surface is covered with waterMy glasses are broken.I was greatly surprised by a knock at the door.(动作）(状态)Make sentences using Past Participle1.The three students _ ( 三位在事故中受伤) are now in hospital.2. _(用过的课本) are much cheaper than new ones.3. Toms_ （Tom 的断腿使他无法训练）。4. The_ _（这本刚出版的小说在她国家很畅销） 。 5. _will help companies develop new products.（最近刚建的研究 中心）injured in the accidentUsed textbooksbroken leg prevented him from training.published novel is a best-seller in her country.The recently built research centerHomework 1. Dont use words, expressions, or phrases _ only to people with specific knowledge. A. being known B. having been known C. to be known D. known 2. The first textbooks _ for teaching English as a foreign language came out in the 16th century. A. having written B. to be written C. being written D. written 3.-Im very _ with my own cooking. It looks nice and smells delicious. - Mm. It does have a _ smell. A. pleasant; pleased B. pleased; pleased C. pleasant; pleasant D. pleased; pleasant 4. Most of the artists _ to the party were from South Africa. A. invited B. to invite C. being invited D. had been invited 5. Prices of daily goods _ through a computer can be lower than store prices. A. are bought B. bought C. been bought D. buying