first set the property of gv ie "autogeneratecolumn=false",
then add
<asp:gridview id="GridView1" runat="server" autogeneratecolumns="False" xmlns:asp="#unknown">
<columns>
<asp:templatefield>
<ItemTemplate>
<asp:checkbox id="chk" runat="server" />
<asp:linkbutton id="lnk" runat="server">LinkButton</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</asp:GridView>
</asp:linkbutton></asp:templatefield></asp:gridview>
gud luck......