You can tell the sentence above is written in third person because

Match the definition to the word. infection conjugation affix,syntax specializion generalization amelioration etymology pejoration declension. 1.word derivation. 2.gaining a negative connotation. 3.narrowing in meaning. 4.going a positive connotation. 5.verb inflections. 6.ending denoting grammatical function. 7.broadening in meaning. 8.relations of sentence parts. 9.john inflections. 10.morphine added to a base.