用来说明或修饰名词、代词的词称为形容词。

一、形容词的句法作用：作句子中名词的定语、句子的表语以及宾语补足语。

二、形容词在句子中的位置：

　　1. 作定语时放在名词的前面,且音节少的词放在音节多的词之前。如：a big yellow wooden wheel(一个黄色的大木轮)
　　2. 作表语时放在连系动词之后。如：The price sounds reasonable.(这个价格听起来算是合理)
　　3. 作宾语补足语时放在宾语之后。如：We must try our best to keep our environment clean.(我们必须尽力保持我们的环境清洁)
　　4. 后置的情况：
　　①修饰复合不定代词时放在代词之后。如：Something serious has happened to him.(他发生了严重的事故)
　　②与表示“长、宽、高、重、老、远离”的词连用时形容词后置。如：He’s 1.8 metres tall.(他身高1.8米。)The moon is about 380,000 kilometres away from the earth.(月球离地38万公里)

三、有关形容词的用法辨析：

　　1. whole与all：记住两个词序：① the whole + 名词； ②all (of) the + 名词。如：He was busy the whole morning.(整个早晨他都很忙) / He can remember all the words he learns.(他能记住学过的所有单词)
　　2. tall与high, short与low：指人的个子时用tall与short；指其他事物时一般用high与low。如：He’s very tall/short.(他个子高/矮) / Tall trees are standing on both sides of that avenue.(大道的两侧有高大的树木) / A few people live on high mountains.(少量的人住在高山上)
　　3. real与true：real一般指东西的真假,译为“真的”；而true则指事情或消息的可靠性,译为“真实的”。如：This is a real diamond(钻石) and it’s very expensive.(这是货真价实的钻石,非常贵) / --Is that true?-Yes. I heard it with my own ears.(那真实吗？ 是的,我亲耳所听)
　　4. interested与interesting的区别：interesting指人或东西“有趣的”,作定语或表语,而interested则表示人对别的事物“感兴趣的”,只能作表语。如：The man is very interesting and all the children like him. (这个人很有趣,孩子们都喜欢他)/ This book is interesting and you can really enjoy yourself.(这本书很有趣,你会真正获得享受) / I am interested in science.(我对自然科学感兴趣)
　　5. such用法： such + a(n) + 名词(单数)(+that从句)。如：I have never seen such a foolish(愚蠢的) boy.(我从来没有见过这么蠢的男孩) / He had such a terrible accident that he could never forget it.(他遭遇了这么可怕的事故,他永远也不会忘记)
　　6. good与well：表示“好”时,作定语或表语用good,作状语用well；表示“(身体)好”时用well.如：Doing sports is good for us.(进行运动对我们有益) / Study well and make progress every day.(好好学习,天天向上) / --How are you?-I am very well.(你好吗？我很好。)
　　7. nice与fine：的区别：nice表示令人愉快的,可以指东西、人物外表等；fine一般指身体或天气好。如：Let’s go and share(分享) the nice cake.(我们去分享那块美味的蛋糕吧) / She is a nice girl.(他是个漂亮的姑娘) / What a fine day!(多好的天气！) /He’s fine recently(最近).(近来他身体不错)
　　8. too much与much too：too much表示“太多的”,修饰事物数量；much too表示“太过,过分”,修饰形容词或副词。如：I am full because I have had too much rice.(我饱了,因为我吃了太多的米饭) / That coat is much too dear.(那件大衣太贵了)
　　9. quick、fast与soon：quick与fast基本同义,quick往往指反应速度快,fast往往指运动速度快,而soon则表示时间上很快即将发生。如：After a quick breakfast, he hurried to school leaving his bag at home.(匆匆地吃过早饭,他朝学校赶去,却把书包忘记在家) / A train is much faster than a bus.(火车比公共汽车快得多) / His father will be back to China very soon.(他父亲很快就要返回中国)
　　10. lonely与alone：lonely是表示心理活动的形容词,意思是：“孤独的,寂寞的”,作定语或表语；alone的意思是：“独自的,单独的”,指无人陪伴,仅作表语,(作为副词的alone可作状语)。如：He lives alone but he doesn’t feel lonely.(他一人独住,但是并不感到孤独)/ He is a lonely person. You can not easily get on well with him.(他是个孤独的人,你要和他相处好实在不易)