构词法前缀：通常改变词义 后缀：通常改变词性a- : amoral 不道德的 apathy 无情 dis: dishonest, disappear, disloyal, disorder in/ir/ il/im: incorrect injustice impossible illegal irregular non: non-scientist non-smoker non-stop un: unhappy, unreal, unofficial, unfair3）贬义前缀 mal-, mis-, pseudo-(伪,假)maltreat，malfunction 机能失常，malnutritionmislead, misinform, misfortunepseudoscientific, pseudo-realismwell: well-known, well-informed5) 表示态度或倾向的前缀anti-(反对，防止)：antiwar, antiaircraft防空袭的contra-(
