Yes No Questions
From Scottish Gaelic Grammar Wiki
Yes/No question (Adger and Ramchand 2005:(3))
An robh thu sgith? C.Q be.PST you tired 'Were you tired?'
Negative Yes/No question (Adger and Ramchand 2005:(6))
Nach robh thu sgith? C.Q.NEG be.PST you tired 'Weren't you tired?'
Embedded question (Adger and Ramchand 2005:(4))
Dh'fhaignich e an robh thu sgith. ask.PST he C.Q be.PST you tired 'He asked if you were tired.'
Negative embedded question (Adger and Ramchand 2005:(8))
Dh'fhaignich e nach robh thu sgith. ask.PST he C.Q.NEG be.PST you tired 'He asked if you weren't tired.'
Wh-question (Adger and Ramchand 2005:(12))
Cò a bha sgith? who C.REL be.PST tired 'Who was tired?'
Equative wh-question when the subject is a wh-element ((Adger and Ramchand 2005:(15))
Cò an tidsear? who the teacher 'Who is the teacher?'
Pied-piped wh-question (Adger and Ramchand 2005:(21))
Dè an seòrsa tidsear a tha annad? what the sort teacher C.REL is in + you 'What sort of teacher are you?'
Fronted wh-phrases are always nominative marked (Adger and Ramchand 2005:(31)).
Dè a' chraobh a bha thu a'geàrradh? which the tree.NOM C.REL be.PST you cutting 'Which tree were you cutting?'
The sentence becomes ungrammatical with genietive marking on the noun inside the wh-phrase (Adger and Ramchand 2005:(31)),
Dè a' chraobhe a bha thu a'geàrradh? which the tree.GEN C.REL be.PST you cutting 'Which tree were you cutting?'
although the object noun is marked with genitive in declaratives (Adger and Ramchand 2005:(30))
Bha thu a'geàrradh na craoibhe. be.PST you cutting the tree.GEN 'You were cutting the tree.'
how to answer: yes or no