【正确答案】：
ANTONYMS CAN BE DEFINED AS WORDS WHICH ARE OPPOSITE IN MEANING. THEY CAN BE CLASSIFIED INTO THREE MAJOR GROUPS. 
（1）CONTRADICTORY TERMS: THEY ARE SO OPPOSED TO EACH OTHER THAT THEY ARE MUTUALLY EXCLUSIVE AND ADMIT NO POSSIBILITY BETWEEN THEM，SUCH AS “TRUE – FALSE”
（2）CONTRARY TERMS: ANTONYMS OF THIS TYPE ARE BEST VIEWED IN TERMS OF A SCALE RUNNING BETWEEN TWO POLES OR EXTREMES. ANTONYMS SUCH AS “BIG – SMALL” REPRESENT TWO POINTS AT BOTH ENDS OF THE POLE AND CAN ACCOMMODATE A MIDDLE GROUND BELONGING NEITHER TO ONE POLE NOR TO THE OTHER. WE CAN HAVE MEDIUM-SIZED BETWEEN THE BIG AND THE SMALL. 
（3） RELATIVE TERMS: THIS TYPE CONSISTS OF RELATIONAL OPPOSITES SUCH AS “HUSBAND – WIFE”. SUCH PAIRS OF WORDS INDICATE SUCH A RECIPROCAL SOCIAL RELATIONSHIP THAT ONE OF THEM CANNOT BE USED WITHOUT SUGGESTING THE OTHER. IF A IS THE HUSBAND OF B, THEN B IS THE WIFE, WHO MARRIES A. 
【题目解析】：反义词可以定义为意义相反的词。它们可以分为三大类。（1）矛盾反义词：它们彼此对立，相互排斥，彼此之间不承认任何可能性，如“真-假”。（2）对立反义词：这种反义词最好从两极或极端之间的刻度来观察。反义词如“大-小”代表两端的两点极点，可以容纳既不属于一个极点也不属于另一个极点的中间立场。可以在大的和小的中间有中型的。（3）关系反义词：这类词语由“丈夫-妻子”等关系反义词组成。这样的一对词表明了一种相互的社会关系，一个词不能在没有暗示另一个词的情况下使用。如果A是B的丈夫，那么B就是A的妻子，B是和A结婚的人。