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He will do better if properly encouraged. =He will do better if he is properly encouraged. 如果有适当的鼓励，他会做得更好。 注：after doing和before doing为介词短语，after,before是介词，doing为动名词，不在此讨论范围。 2.variety用法归纳： (1)variety可作不可数名词，表示“变换花样，多种多样”等。 I’m for variety.我赞成变换花样。 We demand more variety for our food. 我们要求食品的花样多一点。 Life at school has plenty of variety. 学校的生活有多种多样的内容。 (2)还可作可数名词，表示“品种，各类”。 There are several varieties of red roses. 红玫瑰有好几个品种。 This is one well-known variety. 这是一个有名的品种。 There are numerous varieties of fishes in the lake. 这个湖里有无数种类的鱼。 (3)常用于a variety of,表示“各式各样的”。 This shop has a variety of toys. 这家店里有各种各样的玩具。 She offered a variety of excuses. 她提出了各种各样的借口。 He had a variety of interests. 他有各种各样的兴趣。 (4)Variety前还可以加修饰语。 A great variety of animals survive there. 那里存留下来许多种动物。 The library has a wide variety of books. 这家图书馆有许许多多种类的书。 There was a considerable variety of opinions. 有相当多不同的意见。 3.sight用法归纳 (1)景物，供参观的地方，游览胜地 They are seeing the sights. 他们正在参观游览。 Niagara Falls is one of the sights in the world. 尼亚加拉大瀑布是世界游览胜地之一。 John enjoyed seeing the sights in New York. 约翰喜欢游览纽约的名胜。 (责任编辑：admin) |