语法-冠词.ppt

* * 冠 词 不定冠词的用法?? ??? 冠词是虚词，本身不能单独使用，也没有词义，它用在名词的前面，帮助指明名词的含义。英语中的冠词有三种，一种是定冠词，另一种是不定冠词，还有一种是零冠词。? 不定冠词a (an)与数词one 同源，是“一个”的意思。a用于辅音音素前，而an则用于元音音素前。? 　1) 表示“一个”，意为one；或表every. 　 I have a month, a nose and two eyes. We have three meals a day. 2) 代表一类人或物。?  A knife is a tool for cutting with.?  Mr. Smith is an engineer. 　 3. 当第一次提到某人或某物，且并非特指时，用不定冠词a或an起介绍作用． She is working in a factory. 4.用于人名前，表示说话人对此人不认识，或表示与某人有类似性质的人或事物．”一位名叫…” A Mr. Smith came to visit you when you went out. He wishes to become a Newton. 5．表示乐器的名词前一般用定冠词the, 但前面如果出现定语修饰，也可能用不定冠词a, an。He starts his day by playing the violin.He is playing a borrowed violin. √ √ ６．介词与表示交通工具的名词连用表示笼统的方式，前面一般不用冠词，但如果名词的前面出现了修饰语，前面需加冠词a/an。 　He went to the station by car.　He went to the station in a black car. 7. turn用作系动词时，后面作表语的单数名词前不用冠词。 He turned writer many years later. (=He became a writer many years later.) 8.在序数词前表示“又一，再一” This is the third time I’ve been here. I want to be here a fourth time. √ ９．放在抽象名词前，用来表示具体的一个人或一件事． He is not a success as a leader, but he has gained much experience in teaching. 10. 在形容词＼最高级前表示“非常”是需要不定冠词． Unit Nine is a most difficult unit, but it isn’t the most difficult unit in Book One. √ √ 11.词组或成语。once in a while/?at a loss/  a little / a few / a lot / a type of / a pile / a great many / many a / as a rule / in a hurry / in a minute / in a word / in a short while /  after a while / have a cold / have a try / keep an eye on / all of a sudden? / a great deal of/ a (great )number of/ do sb a favor/at a distance隔开一段时间　　/tell a lie/once upon a time/a knowledge of/ make a living/have a good time/keep a diary  二．不定冠词位置?  不定冠词常位于名词或名词修饰语前。注意： 　１. 位于下列形容词之后： such，what，many，half 　　I have never seen such an animal.? 　　 Many a man is fit for the job.? ２．当名词前的形容词被副词　as, so, too, how, however, enough修饰时，不定冠词应放在形容词之后：?  　It is as pleasant a day as I have