Final answer:
Suffixes can affect the part of speech and can make a word positive or negative.
Step-by-step explanation:
Suffixes are important to pay attention to because they can affect the part of speech of a word. They are added to the end of base words and can change a noun into an adjective or a verb into a noun, for example. Suffixes can also make a word positive or negative by adding prefixes like 'un-', 'in-', or 'dis-.'
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