Here are the pronouns in Gaelic:
sibh- you (plural/polite)
The verb "to be" in the present tense:
...is "tha." That's it. No need for conjugation, it looks like. All you need to do is put in the personal pronoun to distinguish the conjugation of the verb.
Tha Ian òg- John is young
Tha mi sgìth- I am tired
Tha e fuar- he/it is cold
Tha iad an-seo -they are here
In this case, you would just need to put the verb in the beginning of the sentence, followed by the personal pronoun.
It's that easy.
Please share your input/questions/corrections because I'm completely new to this language too!