"How is he?"
Translation:Ciamar a tha e?
I still don't quite understand how "a" works in this sentence. So you use it after any interrogative like "How"? Would you also use it for all interrogatives like "what, when, where, who, which, whom, whose, why"? (I had to look up what interrogatives were, even though English is my first language haha).
"Would you also use it for all interrogatives"
In theory, except they often end in vowels, so it's 'invisible' in those cases, but it is there (as the grammatical implications of its presence remain).
And an exception is "càite?" (where?), which takes the dependent form of the verb (e.g "Càit a bheil?").