noun clause 名词性从句（noun clause 名词性从句）.doc

noun clause 名词性从句（noun clause 名词性从句） sefc grammar data code: s - ml5 - 3 - h004noun clause 特性: 和名词一样, 在句中可以担任主语、标语、宾语 (动词宾语和介词宾语) 以及同位语. 分类: 主语从句、表语从句、宾语从句和同位语从句. 主语从句 定义: 在句子中担当主语的是一个从句, 这个从句就叫做主语从句. 主语从句的引导词 (决不能省略) 连词: that, whether 关系代词: what, whatever, who, whoever 等 连接副词: when, where, how, why 另外在主语从句中主句的动词大多用be动词以及其他系动词. 分类讨论: 1. 由连词that, whether引导的主语从句 表示陈述和选择 引导词在从句中不担任任何成分, 但是不可以省略 多可以改写成用形式主语表述的形式 that the earth is round is true. = it is true that the earth is round. whether they will come is doubtful. = it is doubtful whether they will come. 注意: whether引导主语从句的时候, 不能用if代替 2. 由连接代词或者连接副词引导的主语从句 主要功能: 表示未知事件的客观状态 连接代词who, which 和连接副词 when, where, how, why 都可以引导主语从句, 引导词本身分别在从句中担任主语、宾语和状语, 不能省略.可以用形式主语it引导 但是如果句子本身是疑问形式, 那么必须用it的结构 从句一定要采用陈述语序 who let out the news problems remained unknown. = it problems remained unknown who let out the news. which is right isn t known to us. = it isn t known to us which is right. when we ll start is not clear. = it is not clear when well start. why they didnt come here is not clear to anyone. = it is not clear to anyone. why they didnt come. how this happened is still a question. 3. 以关系代词what, whatever, whoever, 引导的主语从句 what有时可用来表示the thing which 这种意思, 引起从句, 表示一样东西或者一件事情 who, whom, which, what, 可以和ever构成合成词, 和what一样引导从句, ever起强调作用 注意, 此类主语从句不能用形式主语it引导, 他们在句子中担任成分, 不能省略, 语序为陈述语序 what = the thing that (先行词 + which / that) whoever = any one who what they said at the meeting is important. = the thing that they said at the the meeting is important. whoever leaves the office should tell me they. = any one who leaves the office should tell us. whenever the olympic games will be held in beijing is not known yet. 表语从句 引导表语从句的词有: 连词: that, whether 连接代词: the who, which 连接副词: when, where, how, why 等 关系代词: what, whatever 等 从句的语序为陈述语序 my idea is that we ll all go except lili. thats what we should do. the question is how we can get there. china is no longer what she used to be. (在这里, 什么=（国）中国，） 宾语从句 使用的先行词与上述二从句一样 宾语从句与主语从句、表语从句的区别是： 如果