Sub test()
Sheets("blad2").Range("A2:B" & Sheets("blad2").Cells(Rows.Count, "A").End(xlUp).Row).Copy Destination:=Sheets("blad1").Range("A" & Cells(Rows.Count, "A").End(xlUp).Row + 1)
Sheets("blad3").Range("A2:B" & Sheets("blad3").Cells(Rows.Count, "A").End(xlUp).Row).Copy Destination:=Sheets("blad1").Range("A" & Cells(Rows.Count, "A").End(xlUp).Row + 1)
Sheets("blad4").Range("A2:B" & Sheets("blad4").Cells(Rows.Count, "A").End(xlUp).Row).Copy Destination:=Sheets("blad1").Range("A" & Cells(Rows.Count, "A").End(xlUp).Row + 1)
End Sub