Parts of Speech: Using Word Forms CorrectlyParts of speech are the building blocks of sentences; form follows function.
Word form errors occur when writers fail to understand the functions of the parts of speech. The incorrect choice of a part of speech (lexical category) for a particular sentence element results in a word form error, which affects sentence grammar. This includes verbals (infinitives, participles, gerunds) when they are formed correctly but selected incorrectly.
This segment on word forms covers the following topics. Work your way through the explanations and exercises page by page or select a topic to review in the table below.