If the word varies, it means that it has several forms. For example: Book - about the book. The ending has changed, it means that the word shape has changed. The change in the same word is called the word form.
Forming morphemes
Forming morphemes, first of all, is the end. Subfixes can also form not only new words, but also forms of the word. For example: Interesting is more interesting. Read - read. It should be noted that the suffixes of the past time in the verbs form a new form, and do not form new words.
Auxiliary words
Example: read - I would read. Thanks to the word, a new form is formed.
Word shape and single words
When the word change is changed, only the ending is changing, and the basis does not occur. Suffix and consoles (with the exception of forming suffixes) should not change. When changes occur inside the base, single-handed words are formed. Table, table, table, table - shape words. And the table and table are single-tempered words.
Initial shape of the word.
Each variable part of speech is the initial form of the word. As a rule, this is a word in the nominative case and the singular. In word dictionaries are given in their initial form.
The form of the word exists to express the grammatical meaning of the word and convenience of speech.
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