Words could be divided into simple, compound and derived words on the____level.
查看答案
Some important ways of word formation are____, derivation and conversion.
Morphology is the study of the ____structure of words and the ____by which words are formed.
Conjunctions, prepositions, articles and pronouns consist of relatively few words and have been referred to as____-class words since new words are not usually added to them.
Acronyms are words derived from the____ of several words.