【正文】
says ? free morpheme (自由語素) ? Friend friendship friends ? Green greenhouse greenly Morphology (morpheme) ? Derivational morpheme (派生語素) ? Change the category or grammatical class of words, so that a new word is formed ? National nation + al ? nasalization nasalize + ation ? fasten fast + en Morphology (morpheme) ? Derivational morpheme (派生語素) ? Some do not change the grammatical class ? intercollegiate