だ
copula, See である, See です, plain copula
1. be, is
Auxiliary verb, See た・1, た after certain verb forms; indicates past or completed action
2. did, (have) done
See た・2, indicates light imperative
3. please, do
よ
Particle, at sentence-end; indicates certainty, emphasis, contempt, request, etc.
1. hey, you, hold on
Interjection
2. yo