A keďže je tam čiastočná zhoda medzi blokmi x=2, 6 a x=4, 8, dá sa to ešte zjednodušiť a celý kód bude:
Private Sub ComboBox30_Change()
Dim x As Byte
Dim y As Byte
On Error Resume Next
x = ComboBox2.ListIndex
y = ComboBox30.ListIndex
On Error GoTo 0
Select Case x
Case 0
Select Case y
Case 0
ComboBox58.ListFillRange = ""
End Select
Case 1, 5
Select Case y
Case 1 To 10
ComboBox58.ListFillRange = "vera"
Case 11 To 22
ComboBox58.ListFillRange = "verb"
End Select
Case 2, 4, 6, 8
Select Case y
Case 1 To 5
If x = 2 Or x = 6 Then ComboBox58.ListFillRange = ""
If x = 4 Or x = 8 Then ComboBox58.ListFillRange = "verb"
Case 6 To 7
ComboBox58.ListFillRange = "vera"
Case 8 To 22
ComboBox58.ListFillRange = "verb"
End Select
Case 3, 7
Select Case y
Case 1 To 7
ComboBox58.ListFillRange = "vera"
Case 8 To 22
ComboBox58.ListFillRange = "verb"
End Select
End Select
End Sub