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which 结构︰主词＋动词＋名词（物）＋关系代名词（which）＋动词。 说明︰which 可作主格或受格关系代名词，引导形容词子句，前面的先行词接动物或事物，后面接动词，必须和先行词保持一致。 Here is a book， which is very interesting. 这里有一本非常有趣的书。 I like to watch TV programs which are about sports.我喜欢观赏有关运动的电视节目。 They want to sell the house， which has only one door.他们想卖掉那幢只有一扇门的房子。 by oneself 结构︰主词（人，物）＋动词＋by oneself。 说明︰此句型意为某人（物）自己。反身代名词的人称、数和性别，须和相关的主词一致。 They went to Suao by themselves. 他们自己去苏澳。 John fixed the tape recorder by himself. 约翰靠他自己修理录音机。 You cant go mountain climbing by yourself. 你不能自己去登山。 that/those of 结构︰that／those of 作为避免重复的代名词 说明︰英文句构中，两个名词对称而形成比较的情况时，为避免重复，第二个名词若为单数，就改为代名词 that；若为复数，则改为代名词 those.不过在遇到所有格时，可使用所有格名词形态取代 that 或 those. | 
