Ceacht 8
aon 	one, any	{number / n m1}	
duine 	a person 	n m4	
rud	a thing	n m3	
aon duine	any person	[{numb./n m1}]+[n m]	
aon rud	anything	n	
sa bhus	in the bus	[prep.incorp.art.] +[n m4 #len.#]	
sa charr	in the car	[prep.incorp.art.] +[n m1 #len.#]	
sa bhád	in the boat	[prep.incorp.art.] +[n m1 #len.#]	
sa traein	in the train	[prep.incorp.art.] +[n f5]	
sa stáisiún	in the station	[prep.incorp.art.] +[n m1]	
sa bhosca	in the box	[prep.incorp.art.] +[n m4 #len.#]	
féach !	look !	[imperative v]	
dia daoibh!	good day ( to >1 person )	[n phrase]	
a leanaí	children	[voc case]	

Dia daoibh (good day):  In Lesson 1 we saw how to greet one person and how to reply to that greeting.  This lesson extends that greeting to more than one person by changing the prepositional pronoun (duit) in Lesson 1 to daoibh.  So we now have:

duit 	(to you - singular), and
daoibh 	(to you - plural).

The verb féach is the first regular verb we've come across thus far in the course - tá being one of 11 irregular verbs.  

Féach is in the imperative mood which means that its use here demonstrates how to give an instruction, or a command, to one person

In Irish dictionaries, one normally looks up a verb by searching for  the root of the verb, which happens to be the 2nd person singular of the imperative.( e.g. féach ).