When you want to tell your teacher you’ve finished something, you say:

Tha mi deiseil.

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If you want to know what to do next, ask:

Dé nì mì a-nise?

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If you don’t know something, you say:

Chan eil fhios agam.

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If you want to say excuse me, you say:

Gabh mo leisgeul! or Gabhaibh mo leisgeul!

to someone older or more than one person.