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to the teacher. 四、at, in和on表示地點時的區(qū)別 at表示地點: (1)用于指較小的地方。如: I shall wait for you at the station. (2)用于門牌號碼前。如: He lives at 115 Zhongshan Road. in表示地點: (1)用于指較大的地方。如: He lives in Shanghai. (2)雖然是很小的地方,如果說話人住在那里,也可用in。商店、學(xué)校、機(jī)關(guān)等,若看作一個地點(point)用at,若看作一個場所(place)用in。如: I met him at the postoffice. I’m now working in the postoffice. on表示地點,一般指與面或線接觸,意為“在……上;在……旁”。如: The picture was hanging on the wall. New York is on the Hudson River. 五、above, over, on, up表示“在……上”之間的區(qū)別 above指“……上方”,表示相對高度,不一定在正上方,其反義詞為below。如:We’re flying above the clouds. over指“在……正上方”,表示垂直上方,其反義詞為under。 如: The bridge is over the river. on表示“在……上面”,與物體表面接觸,與beneath相對。如:There is a map on the wall. The earth felt soft beneath our feet. up表示動作的方向往上,反義詞為down。 如: Please hang the picture up. Do 的作用動詞do在句中的作用可以概述為四句十二字:做實義,助動詞,替前文,強(qiáng)語氣。作用一:實義,動詞dodo作實義動詞時,有do, does, did, done, doing五種形式,還有及物、不及物之分。如:做;研究;整理;完成。如:①The old man does an hour of sport every day. ②She did her homework at home last night.③Mother was doing the cooking when I reached home. ④Have you done the exercises yet?行動;工作;進(jìn)展;足夠。如:①Kate does very well in her Chinese. ②How do you do? ③Well done! ④That will do. 作用二:助動dodo