总是因为修饰问题纠结个没完,实在忍无可忍了,查了一下白勇,总结一下。 状语从句 1 状语从句的位置: 1)主句前:When rates were raised in 1985, postal service officials predicted that in crease would make further rate increase unnecessary. 2)主句后:in the past ten years, the dropout rate among Black high school students has fallen substantially, while the number of Blacks attending college has more than doubled. 3)句中:between 1975 and 1985, nursing –home occupancy rates averaged 87 percent of capacity, while admission rates remained constant, at an average of 95 admissions pre 1000 beds per year. 4)所修饰的动词短语后:it is an oversimplified view of cattle raiding to say that all one has to do with cattle is leave them alone while they feed themselves and then corral them and drive them to market when the time is ripe. 2 状语从句的主语: 1)状语从句在主语之前时,如果两者的主语表示同一个人,其中任何一个主语都可以用代词表示。如果主语在状语从句前面,则只有状语从句的主语可以用代词表示。 2)主句的主语和状语从句的主语可以是同类事物,也可以不是同类事物。 3 时间状语从句 after ,when, whenever, while , as , since, ever wince, until, once, as soon as, before/after+句子/短语/doing sth, before/after doing sth,+句子(doing sth的逻辑主语等同于句子主语) 4 方式状语从句 as 是用来引导方式状语从句的常用连词,含“照什么方式”或者“类似什么方式”的意思。 5 目的状语从句和结果状语从句 1)so/such…that 表示结果,可以用在单一主谓结构,也可以用在复杂主谓结构中,不用考虑逻辑主语问题,such后面一般不加抽象名词。特别说明:so/such,,as to 表示结果,用语单一主谓结构,逻辑主语等同于句子的主语,也就是说,句子的主语可以执行as to 后面动词的动作,such后面一般不加抽象名词 2)so that 状语从句,从句中出现情态动词,so that表示目的,从句中没有出现情态动词,so that 表示结果。Such that 状语从句,表示结果。不用考虑逻辑主语问题。 6 条件状语从句 if , unless, only if (强烈条件关系), as long as, on condition that , should (如果/假如)+主语+do/be done 7 转折让步状语从句 although, even though ,even if, while, whereas, where, however much/many/long/great…however表示强烈语气。特别注意:despite(介词)+名词短语,不能加句子或者doing 8 原因状语从句 because, as, since, for, now that ,if only because, in that 9 状语从句的省略 正确形式: 表示时间,条件,转折的连词(when/while/if/unless/although/even though/even if)+形容词短语/ing分词/ed分词 注意:逻辑主语等同于句子主语 错误形式:表示时间,条件,转折的连词+名词短语/介词短语 特殊情况:once 可以加介词短语/名词短语,whatever 可以加名词短语构成状语从句省略。
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