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Word Formation

Suffixes that Change Word Class

Noun, verb, adjective and adverb forms.

Explanation

Suffixes decide the grammatical slot a word can occupy. Common noun suffixes include -tion, -ment, -ness and -ity; adjective suffixes include -able, -ive, -ous and -al; adverb suffix -ly. Choosing the wrong one produces a word that exists but does not fit the sentence.

Examples

Their decision was final.
The process is manageable.
She explained it clearly.

Common mistakes

Their decide was final.
Their decision was final.
A verb cannot fill a noun slot.
The process is manage.
The process is manageable.
The adjective needs its suffix.
She explained it clear.
She explained it clearly.
Manner adverbs take -ly.

More Word Formation

Prefixes that Change Meaning

Un-, dis-, mis-, over-, under-, re-.