二、非限制性定语从句中要注意的几个问题
1. 关系副词why不能引导非限制性定语从句, 但可用for which 代替why来引导。
*Paper-cutting enjoys increasingly high popularity, for which it is an ideal gift for friends.
剪纸越来越受欢迎, 这就是它可以作为一份理想的礼物送给朋友的原因。
2. 非限制性定语从句由“介词+关系代词”引导时, 其中的关系代词用which或whom。
*There were 128 people on the Flight, Sichuan Airlines 3U8633, nine of whom were crew.
川航3U8633共搭乘有128人, 其中包括9名机组人员。
*Our City Library has just set up an English Corner, for which volunteers are badly needed.
我们市图书馆刚刚建立了英语角, 对此, 急需志愿者。
*That tree, whose branches are almost bare, is very old.
→That tree, of which the branches are almost bare, is very old.
→That tree, the branches of which are almost bare, is very old.
那棵树很老了, 它的枝条几乎是光秃秃的。
“the+名词+of whom/which”可换为: “of whom/which+ the+名词”或“whose+名词”。
