I.冠词1.概念冠词是置于n.前、说明n.所指的人或事物的一种虚词。冠词也可以说是名词的一种标志, 它不能离开名词而单独存在。2. 种类:a/an, the3. 定冠词the 的用法:特指双熟悉,上文已提及世上独无二,序数最高级某些专有名,习语及乐器1)When we saw his face, we knew was bad.A. the news B. some news C. a news D. news2) Do you know the girl who is standing there?3) the sun, the moon , the earth, the world4) Shanghai is second largest city in China.A. a B. / C. the D. one5) the Pacific Ocean , the Yellow River, the United States6) play the piano7) ---Do you know who invented telephone?---No , but it is really most useful invention.