''To have''

There is no verb 'to have' in Gaelic, so instead people say that things are 'at them'. Use the verb 'to BE' and the preposition 'aig' (= at).

Tha (noun) aig (noun/person).
BE (noun) at (noun/person).
(noun/person) has (noun).

ex. Tha cupa cofaidh aig Ruth. Ruth has a cup of coffee.

'Aig' (like most Gaelic prepositions) conjugates according to person. This means that if you want to say something such as 'She has a banana', you have to use the correctly conjugated 'prepostional pronoun'.

aig + i (she) = aice

Tha banana aice.
Be banana at-her.
She has a banana.

Conjugations for aig:
agam = at-me
agad = at-you (sing.)
aige = at-him
aice = at-her
againn = at-us
agaibh = at-you (plur. & polite)
aca = at-them

Other Examples:
Tha bean aige. bean = wife/woman
Tha duine aice. duine = husband/man/person
Tha leabhar againn. leabhar = book
Tha taigh agaibh. taigh = house

Some Expressions:
Tha fhios agam. = I know.
fios/fhios = knowledge

Tha gaol agam ort. = I love you.
BE love at-me on-you.
gaol = love, ort = on-you