Chemical net ionic equation

can someone tell me what the net ionic equation for

SO2 + H2O -> H2SO3

S8 + O2

CaCO3 + HCl

thank you!

SO2 + H2O -> H2SO3
No net ionic equation possible . The two reactants do not dissociate to ions and the "product"H2SO3" does not exist in reality . What is produced is a solution of SO2 in H2O which does not dissociate into ions

S8 + O2
No net ionic equation possible . The two reactants do not dissociate - nor does the product SO2 .

CaCO3 + HCl
Her we can proceed
Equation:
CaCO3(s) + 2HCl (aq) → CaCl2(aq) + CO2(g) + H2O(l)
Ionic equation:
CaCO3(s) + 2H+(aq) + 2Cl-(aq) → Ca2+(aq) + 2Cl-(aq) + CO2(g) + H2O(l)
Net ionic equation:
CaCO3(s) + H+(aq) → Ca2+(aq) + CO2(g) + H2O(l)