人教版高中英语选择性必修第一册知识点(24)

(8)under no circumstances意为“决不”，置于句首时句子用部分倒装语序。
否定副词位于句首时的倒装：
①在正式文体中, never, seldom, rarely, little, hardly, scarcely, no sooner, no longer, nowhere等含有否定意义的副词若位于句首，则其后要用部分倒装；
②某些起副词作用的介词短语，如in no way/on no account/under (in) no circumstances等由于含有否定词，若位于句首，其后要用部分倒装；
但是，in no time (立即，马上)位于句首时，其后无需用倒装语序。
(9)非限制性定语从句
功能：补充说明先行词或整个主句
形式：与主句用逗号隔开
意义：去掉从句后主句意思仍完整
译法：从句单独译成一句
Professor Smith, who is my tutor, has gradually adjusted to the life in China.
史密斯教授是我的导师，他已经逐渐适应了中国的生活。
①. 引导非限制性定语从句的关系词
引导非限制性定语从句的关系词有：关系代词which, who, whom, whose, as; 关系副词when, where等。
Tom was always late for school, which made his teacher annoyed. 汤姆上学总是迟到，这一点令他的老师很生气。
Our graduation ceremony will be held in July, when we’ll say goodbye to our teachers. 我们的毕业典礼将于7月份举行，到那时我们就要跟老师道别了。
②. as引导的非限制性定语从句
as引导的非限制性定语从句，常可看作固定结构:
as is known to all 众所周知
as is often the case 情况常常如此
as we all know 众所周知
as we expected 正如我们预料的那样
as has been pointed out 正如已经指出的那样