否定前缀在英语中有其独特的作用,它使表达更简洁有力,使语言更丰富多彩。英语中否定前缀数目不少,其中否定意义明显的是:a-,dis-,in-,non-,un-,其中 a-可有变体 an-(用在元音前),in-(用在/l/音前),im-(用在双唇音/b/,/p/,/m/前)和 ir-(用在/r/音前)。还有其它一些表达“相反”意义的前缀,如 de-(defrost), The negative prefix has its unique role in English. It makes the expression more concise and powerful, making the language more colorful. The number of negative prefixes in English is quite large. The negative meanings are obviously: a-, dis-, in-, non-, un-, where a- may have variations an- (used before vowels), in-( Used in front of /l/, im-(for bilabial sound /b/, /p/, /m/ before) and ir- (for /r/ before sound). There are other prefixes that express the “opposite” meaning, such as de-(defrost),