bound morphemes

bound morphemes
【正确答案】：Bound morphemes that cannot be used by themselves, but must be combined with other morphemes to form words that can be used independently.
(P51)：黏着词素是那些不能够独立使用、必须和其他的自由词素或黏着词素结合在一起才能形成一个单词的词素。黏着词素包括两类:词根和词缀。