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Sth. is being + V-ed 结构︰主词+is being+过去分词 说明︰此句型意为正在被。是进行式被动语态. Money is being used in place of something more direct.金钱正在被更直接地用来取代某种东西。 The machine is being experimentally used. 这些机器正在被实验地使用着。 The problems are being discussed. 这些问题正在被讨论着。 go + V-ing 结构︰go+现在分词 说明︰此句型意为从事。go 之后的现在分词通常是运动类的动词，如：fishing(钓鱼)，boating(划船)，skating(溜冰)，skiing(滑雪)，hunting(打猎)，mountain climbing(爬山)， shopping(购物)等。 Sometimes Mr. Black went swimming with the children.有时布拉克先生和这些小孩去游泳。 We went fishing yesterday and I caught three fish. 我们昨天去钓鱼，而我钓了三条。 I find it interesting and healthy to go mountain climbing. 我觉得爬山有趣又有益健康。 The American housewife probably goes shopping only once or twice a week. 美国家庭主妇可能一星期只购物一、二次。 You may go grass skiing， bicycle riding， or shopping on the weekend. 周末你可以去滑草，骑脚踏车，或购物。 | 
