Noun, Adjective, and Adverb

Hi ESL

I was looking up the word 'affirm' in a dictionary, and couldn't help but to know how to use the related forms for any type of word e.g. noun, adjective, adverb, etc.

Example:
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af·firm·a·ble, adjective

af·firm·a·bly, adverb

af·firm·er, noun

af·firm·ing·ly, adverb

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The above example is for the word 'affirm'. Because there are 2 adverbs (af·firm·ing·ly and af·firm·a·bly) in the example, so can either of those adverb's be used in a sentence, or do one have its own meaning than the other? If so, how would you write a sentence for the 2 adverbs?

How do I know when to use the Noun, Adjective, and Adverb in a sentence? Although I know what it means (I hope), sometimes I get them mixed up, or unsure how to use it in a sentence. Or if someone can post some examples for the word 'affirm'?

I know my question feels a little uncomfortable, and definitely something that you would learn in primary school . However, I do know we have our own level of understanding or learning, and would surely be greatful if someone can answer my question.

Many thanks in advance

CHEERS