The word unhappy has three morphemes, namely, un-, hap, and -y, of which hap is a ________ morpheme, while un- and -y are ________ morphemes.
free; bound
Morphemes can be classified into two types. Those that may occur alone, that is, those that may make up words by themselves, are free morphemes. Those that may not occur alone and must appear with at least one different morpheme are called bound morphemes.