是that is why还是which is why.docVIP

是that is why还是which is why at which point的用法 at which point用于引导定语从句，其意为“就在这时”“就在那时”等，在许多情况下相当于 and at that (this) moment。如： He lost his temper, at which point I decided to go home. 他发脾气了，这时我就决定回家了。 The speaker paused to examine his notes, at which point a loud crash was heard. 讲演者停下来查阅他的笔记，就在这时，听到了砰的一声巨响。 The film started to get very violent, at which point I left. 那部电影看着看着出现了极残暴的场面，我立刻就走了。 【注意】千万不能在 at which point 前加并列连词。如： 讲演者停下来查阅他的笔记，就在这时，听到了砰的一声巨响。 误：The speaker paused to examine his notes, and at which point a loud crash was heard. 正：The speaker paused to examine his notes, at which point a loud crash was heard. 正：The speaker paused to examine his notes, and at that moment a loud crash was heard. who (whom) 和that的用法区别详解 在定语从句中，关系代词who (whom) 和that都可指人和物，在一般情况下，可以互换使用，但在下列情况下值得注意： 一、用who (whom) 而不用that的情形 (1) 在非限制性定语从句中的先行词指人时，只能用who (whom)。如： My sister, who is studying abroad, sent me a beautiful present just before this Christmas. 我姐姐，她在国外学习，就在圣诞节前给我寄来了漂亮的礼物。 (2) 当定语从句对指人的先行词进行隔位修饰时，只能用who (whom)。如： Do you know the girl in front of the blackboard who is speaking to the students? 你认识黑板前面正在给学生们讲话的那位女孩子吗？ (3) 当先行词为people和those时，只能用who (whom)。如： Those who want to go there come here please. 那些想去那儿的人请来这边。 (4) 当先行词为one, ones, anyone, everyone, none, all(指人) 时，只能用who (whom)。如： Anyone who is against us is our enemy. 任何反对我们的人就是我们的敌人。 (5) 先行词指人，而关系代词在从句中作主语时，一般多用who。如： The man who came here yesterday said he would come again in a few days. 昨天来这儿的那个人说过几天他会再来。 (6) 在there be句型中名词的定语从句多用who (whom)。如： There are students in our class who / whom you have met. 我们班有些学生你见过。 (7) 当句子中有两个指人的现行词分别带有两个定语从句时，若一个定语从句的引导词为that, 那么，另一个定语从句的引导词必定为who。如： The boy that you met just now is Li Ming’s brother who just graduated from a university. 刚才你会到的那个男孩是李明的刚从大学毕业的弟弟。 二、用that 而不用who (whom)的情形 (1) 当先行词前面有形容词的最高级或序数词修饰时，引导词只能用that。如： The tallest player that plays football for our team is from Shandong. 在为我们队踢足球的最高哪个运动员来自山东。 (2) 当先行词前面有only, some, any, no, every, little, few, much, all,