大学英语四六级考试：介词用法口诀 7

　　将来时态in...以后

　　例: They will come back in 10 days. 他们将10天以后回来。

　　I'll come round in a day or two. 我一两天就回来。

　　We'll be back in no time. 我们一会儿就回来。

　　Come and see me in two days' time. 两天后来看我。(从现在开始)

　　after... (从过去开始)

　　小处at大处in

　　例：Li and I arrived at Heishan county safe and sound, all is well. Don't worry. 李和我平安地到达黑山县，一切很好，勿念。

　　I live in a great city (big city), my sister lives at a small town while my parents live at a village. 我住在大城市，我姐姐住在一个小城镇，而我的父母则住在农村。

　　I'm in Liaoning, at Anshan. 我住在辽宁省鞍山市.

　　有形with无形by，语言 、单位、材料in

　　例：The workers are paving a road with stone. 工人们正用石子铺路。(有形)

　　The teacher is correcting the paper with a new pen. 这位教师正用一支新笔批改论文。(有形)

　　"Taking Tiger Mountain by Strategy" is a good opera. <<智取威虎山>>是-出好戏。(无形)

　　The product is separated by distilation into gasoline and gas oil. 这种产品是用蒸馏分离出气油和粗柴油。 (表示方式、手段、方法--无形)

　　I really can't express my idea in English freely in-deed. 我确实不能用英语流利地表达我的思想。 (表示某种语言用in)

　　I wrote a novel in Russian. 我用俄语写了一本小说。(同上)

　　The kilometer is the biggest unit of length in the metric system. 公里是米制中最长的长度单位。 (表示度、量、衡单位的用in )

　　The length is measured in meter, kilometre, and centimetre. 长度是以米、公里、厘米为单位来计算的。(同上)

　　This board was cast in bronze not in gold. 这个牌匾是铜铸的，不是金铸的。