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三 . 具體內(nèi)容 : (一) in 的使用 1. 表示所處方位: A) at, in 表示在某地時(shí), at 后接小地方, in 后接大地方。 . When did you arrive at the station? I arrived in Beijing last night. B) 表示“位于”, in 表示在某范圍之內(nèi) . Inner Mongolia lies in the north of China. Taiwan is in the southeast of China. 2. 表示時(shí)間 A) in 用于表示在年,月,季節(jié),上午 /下午 /晚上 /白天 . in May,1994 in spring in the morning/afternoon/evening/ the day It’s getting warmer and warmer in spring, and plants are growing B)后跟表示一段時(shí)間的短語,“在 …… 時(shí)間內(nèi)”或“在??時(shí)間后” Can you finish drawing a horse in five minutes? 3. 其他用法 表示“穿著,戴著”或“用某種語言 /材料”等 . She was in red. Please write it in a blue ink. What’s this in English? It’s an EnglishChinese dictionary. (二 )must, have to 的使用。 . We must work hard.[ We have to work hard if we want to live better. 2. must 只有一種 形式,通常表示現(xiàn)在或?qū)淼膭?dòng)作,而 have to 有各種時(shí)態(tài)。 Mustn’t 表示“不準(zhǔn)”,“不允許”,“禁止”; don’t have to 則表示“不必”,與“ needn’t”同意。 . If it is really lost, it must be found. You must be very tired. Ex. Read the text and try to choose a correct heading from the box. In 1974, the tomb of the First Emperor, Shi Huang Di, was d