PRESENTED BY CC
Grammar and usage
Non-restrictive attributive clauses
? 限制性定语从句 ? as ? as
做关系代词既可以指人，也可指物，在从句中 作主语、宾语或表语。 一般用于“such...as”“th
e same as”“as...as” 结构中。 have found such material as are used in their 作主语 factory.
felt such heat in the forest as they had never felt before.
is not the same man as he was.
? 非限制性定语从句 ? 代表整个句子的内容，意为正如、好像。 ? As
we all know, light travels much faster than sound.
宾语或表语。as 和 which都可代表整个句子的内 容或主句中的某一成分。
as 和 which 的区别（非限制性定语从句）
As he realized, I was very useful to him.(在前)
Air, as we know, is a gas.（在中）
He was a foreigner,as I know from his accent.(在
当定语从句位于主句之后，纯粹表示主句所述 内容，不带有“如 …… 那样”的意思时，往往用 which, 而不用as。which可以用and this代替，译为 “这一点，这件事”。例如： always treats me just like a baby, which I can’t bear.
will turn out contrary to one’s wishes, as is often the
? As ? As ? As ? As
we know(众所周知) has been said above/before（正如前文所述） has been pointed out（正如已经指出的） might be imagined（可以想象得到）
? 1. ? 2. ? 3.
which He said that he was invited, ________ was a lie.
as Where there is smoke, there is fire, ________ you know. as Harry is unusaually tall, ________ are his brothers. as ________ all his friends agree, he was unusually warm-hearted, loving and generous.
as He passed the exam again, ________ was expected. which was unexpected. ? 6. He passed the exam again, ________
? 5. ? 7.
which makes me happy. He passed the exam again, ________
? 扩展： ? as 一般在肯定句中，而 which 则可以用于含有否定意义的
Finish Part C1 on page104 in workbook.