Ceacht 26:
ar	asks a question 	interr vb part.	
nár	asks a negative question	neg. interr vb part.	
ar imigh sé?	did he go?	[interr vb part]+[v.]+[pron.]	
ar tháining sí?	did she come?	[interr vb part]+[v.]+[pron.]	
ar rith sé?	did he run?	[interr vb part]+[v.]+[pron.]	
nár shiúil sé?	didn't he walk?	[neg. interr vb part]+[v.]+[pron.]	
nár léim sí?	didn't she leap?	[neg. interr vb part]+[v.]+[pron.]	
nár thit sé?	didn't he fall?	[neg. interr vb part]+[v.]+[pron.]	
má	if	conj.	
Dia anseo isteach!	God save all here!	[n m.(irreg.)]+[dem adv.(adv. of place)]+[ adv. ( of motion)]	
anocht	tonight	adv.	
pionta	a pint	n. m4	
más é do thoil é	(if you ) please	[conj. = (má+is)+[pron.]+[pron.]+
[n. f3]+[pron.] 	

ar (positive interrogative marker): As mentioned in the notes for Lesson 25, this ar is used with the past tense of ALL regular verbs and 5 irregular verbs when one is asking a positive question, such as:

Ar imigh sé? - Did he go?
Ar tháinig sé? - Did he come?
Ar rith sé? - Did he run?

Remember that ar is used in the past tense only!

tháinig is the only irregular verb in the three examples above

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nár (negative interrogative marker):  This is used to turn a positive past tense question into a negative one.  e.g.:

Nár tháinig Mícheál fós? - Did Michael not come yet? (page 57 of the book)
Nár shiúil Nóra? - Didn't Nóra walk?