题目内容
Words can be classified into open class words and _____ class words.
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A morpheme which can be a word by itself is called a ______ morpheme, whereas a morpheme that must be attached to another one is a ______ morpheme.
The variant forms of a morpheme are called its ______.
_______ is an affixational process that forms a word with a meaning and /or category distinct from that of its bases.
_______ is a branch of linguistics which studies the internal structure of words and the rules by which the words are formed.
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