ην verb - imperfect indicative - third person singular
en  ane: I (thou, etc.) was (wast or were) -- + agree, be, have (+ charge of), hold, use, was(-t), were.
γαρ conjunction
gar  gar: assigning a reason (used in argument, explanation or intensification; often with other particles)
διδασκων verb - present active passive - nominative singular masculine
didasko  did-as'-ko:  to teach (in the same broad application) -- teach.
αυτους personal pronoun - accusative plural masculine
autos  ow-tos': the reflexive pronoun self, used of the third person , and (with the proper personal pronoun) of the other persons
ως adverb
hos  hoce: which how, i.e. in that manner (very variously used, as follows)
εξουσιαν noun - accusative singular feminine
exousia  ex-oo-see'-ah: privilege, i.e. (subjectively) force, capacity, competency, freedom, or (objectively) mastery, delegated influence -- authority, jurisdiction, liberty, power, right, strength.
εχων verb - present active passive - nominative singular masculine
echo  ekh'-o:  (used in certain tenses only) a primary verb; to hold
και conjunction
kai  kahee: and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
ουχ particle - nominative
ou  oo: no or not -- + long, nay, neither, never, no (man), none, (can-)not, + nothing, + special, un(-worthy), when, + without, + yet but.
ως adverb
hos  hoce: which how, i.e. in that manner (very variously used, as follows)
οι definite article - nominative plural masculine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
γραμματεις noun - nominative plural masculine
grammateus  gram-mat-yooce': a writer, i.e. (professionally) scribe or secretary--scribe, town-clerk.