③其他几组词的辨析。（A）ago、before:ago表示以现在为起点的“以前”；before指以过去或将来的某时刻为起点的“以前”。泛指“以前”用before而不用ago。（B）already、yet、still:already表示某事已经发生；yet表示期待某事发生；still表示某事还在进行，主要用于肯定句。
(C)too、also、either:too和also用于肯定句，too多用于口语，also多用于书面语，either用于否定句。(D)good、well:与good不同的是，well作形容词，只能在系动词后作表语，表示“身体状况好”，也作副词修饰动词。(E)quick、fast:作形容词皆表“快”。fast多指运动的物体，含持续的意思。quick多指一次动作的敏捷、突然，而且持续的时间较短。(F)real、true:形容词表“真的”。real强调真实存在的而不是幻想的，在句中常作定语；true指与事实标准和实际情况相符合，在句中作表语或定语。(G)hard、difficult:均表“困难”，但hard通常指体力上困难；difficult则指智力或技能上的困难，困难程度大于hard。它们都可作定语和表语。
二、精典名题导解
选择填空
1. It is generally believed that teaching is ___________it is a science.（NMET 2001）
A.an art much as B.much an art as
C.as an art much as D.as much an art as
解析：答案为D。本题可从考查形容词的同级比较点入手。在同级比较as…as句式中，如果as后面的形容词作定语且其所修饰的名词前有不定冠词时，该冠词须置于形容词之后，即形成“as + 形容词 + a / an + 单数可数名词 + as”结构。这道题在名词专题中也有解析，不同的是观察视角不同，应注意培养发散思维。
2. It is always difficult being in a foreign country, __________if you don’t speak the language.(NMET 2000)
A.extremely B.naturally C.basically D.especially
解析：答案为D。本题考查副词的词义辨析。注意掌握词语的准确含义，结合语境进行分析。A项意为“极端地”；B项意为“自然地”；C项“基本上”；D项“尤其，特别地”。根据句意“如果你不会讲（它的）语言，在国外你就总会困难重重”可知答案。
3. Professor White has written some short stories, but he is ______known for his plays.(NMET 1998)
A.the best B.more C.better D.the most
解析：答案为C。本题考查副词的比较级和最高级。要把握句式之间的联系，抓住句子的隐藏信息，结合语境进行分析。根据句意，句中but后应有一词组be well known for…。同时，应注意到前后两个分句把professor White的短篇小说和戏剧进行了对比，故应用well的比较级。

三、专项训练
形容词
1.This dictionary is_______of the two books.
A.thicker B.thickest C.thick D.the thicker
2._______the hotel is,_______the service should be.
A.The more expensive;the more better B.More expensive;the better
C.The more expensive;the better D.More expensive;more better
3.-Do you enjoy listening to records?
　-I think records are often_______actual performance.
A.as good as or better than an B.as good or better than a
C.like good or better than an D.as good as any other
4.I’ll get there by six,if_______.
A.not sooner B.no sooner C.not more quickly D.no quick
5.The bananas taste_______and sell_______.
A.good;good B.well;well C.good;well D.well;good
6.Your plan proved_______.
A.correctly B.to correct C.to be corrected D.correct
7.Wait!I have_______to tell you.
A.something of use B.useful something
C.something usefully D.something useful
8.The experiment is_______to be done again.