Do you know any foreign languages, Belle? It helps a great deal to see these principles in action in a system you are familiar with. Otherwise we can look at some Latinate words.
Okay, here is a data set from persian (from my ling 101 text)
dana 'wise'
danai 'wisdom'
xub 'good' xubi 'goodness'
darosht 'thick' daroshti 'thickness'
mard 'man' mardi 'manliness'
Also, here is a some English derivational morpheme rules (which are not intended to be exhaustive but to illustrate the princple of morphological analysis):
noun + -ful ----> adjective (doubtful)
adj + -ly ------> adverb (doubtfully)
verb + -ment ---> noun (amazement)
verb + -er-----> noun (teacher)
adj + -en ----> verb (harden)
noun + -en ----> verb (frighten)
Morphemes can be:
free
bound
derivational
inflectional
If you want to go ahead and define these, we'll see where we're at.