that /ðæt/ I. adj. (pl.those) 1.那，那个：This street is wider than that one.这条街比那条宽。2.那样的，如此的 (=such, such a): He was angry to that degree that he turned pale. 他气到那种程度，连脸色也变青了。‖II. pron. ①指示代词，表示 “那，那个，那时，(刚提到的)那事”： What’s that?那是什么? Is that you, John? (用于打电话或其他听得见而看不着的场合)是你吗，约翰? Anyone can do that. 那事谁都能干。 ②代替句中名词，以避免重复： The area of Shanghai is larger than that of Suzhou. 上海的面积比苏州的(面积)大。［考句］By 1990, production in the area is expected to double that of 1980. 到1990年，这一地区的产量可比1980年翻一番。③用作关系代词，引起定语分句(用于限制性定语分句。其先行词可以是人也可以是物，可以是sing.，也可以是 pl.)：He that runs faster gets the ring.［谚］谁跑得快谁得奖(捷足先登)。［考句］All that is needed is a continuous supply of the basic necessities of life.（全部）所需要的只是持续不断地供应基本的生活必需品。④用于强调结构：It’s your brother that is in danger.你兄弟有危险(本句中的that也可用who代换)。It was in the street that I met him. 我是在街上碰到他的。 What was it that he wanted?他到底要什么? ⑤构成习语that is/that is to say 那就是说，即： ［考句］Codes are a way of writing something in secret; that is, anyone who doesn’t know the code will not be able to read it. 密码是一种密写的方法，也就是说，任何不知道这种密码的人都无法阅读它。that’s all 完了，就这么多(常用在讲话末尾)。‖III.conj. ①引导名词性分句（引导宾语分句的that 可以省略）：They said (that) they could do it themselves. 他们说这件事他们自己能干。The trouble is that he can’t come. 麻烦在于他来不了。That you lost the match surprised us. 你们比赛输了使我们很吃惊。She made a promise that she would never be late again.她保证不再迟到。［考句］Evidence came up that specific speech sounds are recognized by babies as young as 6 months old.已有证据表明，出生仅6个月的婴儿就能辨认一定的语音。（evidence, fact, news, doubt等抽象名词后面可以用that 引出同位语分句）②引导状语从句，表示目的或结果等：Speak louder (so) that I can hear you.讲话声音大点好让我听见。What was the matter with him that he looked so unhappy? 他出了什么事，看起来这么不高兴?③构成复合连词 in that（书面语）1.由于，因为：［考句］ Criticism and self-criticism is necessary in that it helps us to find and correct our mistakes.批评和自我批评是必要的，因为它帮助我们发现和纠正错误。2. 在于：［考句］These two areas are similar in that they both have a high rainfall during this season.这两个地区相似之处在于这个季节降雨量都很大。now that 既然，由于：You ought to write now that you know the address.你既然知道地址，就该写信了。 so that 为了，以便，结果： Bring it nearer so that (= in order that) I can see better. 拿近些，我好看得更清楚。so… that… 如此…以至于…：He is so busy that he can’t be with us. 他很忙，不能与我们在一起。 We got up so late that we missed the train. 我们起得很晚，误了火车。such…that 如此…以至于…：He left in such a hurry that he forgot to lock the door.他走得十分匆忙，以致忘了锁门。 IV. adv.那么，那样：The weather isn’t that hot. 天气没那么热。