Math and mhath both mean good. In which context is each used
In essence, depending on the gender of the noun. Feminine nouns cause lenition of the adjective; math -> mhath.
But what nouns are feminine?
Why is Tha before cofaidh here?
Tha = is/are. The verb goes first in the sentence.
Verb > Subject > Object
If there is an adjective, it follows the subject and/or the object.
Why is it still math, but both are good? Shouldn't it be mhath since it's a plural context?
Math is masculine and mhath is feminine and in this case coffee and te seems to be maskuline.
No, lenition occurs in response to grammatical gender, not number here.
But what if one thing is femenin and another is masculine? What then?
Like if tì was feminine and cofaidh was masculine.
Can anyone answer what THA means?
One of the forms of "is".
I think it is like "is"
Tea is good.
Tha tì math.
Why isn't it Tì gu math?
Because tì is not a verb. "Gu math" is an adverbial phrase, "math' is an adjective.