在初中阶段，最常出现的构词法为前缀和后缀增设，增加前缀改变词根的词义，

在初中阶段，最常出现的构词法为前缀和后缀增设，增加前缀改变词根的词义，增加后缀，改变词根的词性，例如单词friend，词性为名词，词义为朋友，当增加后缀-ly后变为friendly，词性为形容词，词义为友好的，增加前缀un-变为unfriendly，词性为形容词，词义为不友好的

在初中阶段，最常出现的构词法为前缀和后缀增设，增加前缀改变词根的词义，增加后缀，改变词根的词性，例如单词friend，词性为名词，词义为朋友，当增加后缀-ly后变为friendly，词性为形容词，词义为友好的，增加前缀un-变为unfriendly，词性为形容词，词义为不友好的

In junior high school, the most common way of word formation is to add prefixes and suffixes, add prefixes to change the meaning of roots, add suffixes, change the part of speech of roots, for example, the word friend, the part of speech is a noun, the word meaning is a friend, when the suffix ly is added, it becomes friendly, the part of speech is an adjective, the word meaning is friendly, the prefix un - is added to unfriendly, the part of speech is an adjective, and the word meaning is not amicable<br>