“不许可”用英语怎么说

情况不 许可 我帮助你.Circumstances do not permit me to help you [ my helpingyou ] .在明信片上附贴商品的样品是不许可的.It is forbidden to adjoin to a postcard any sample of merchandise.我已预先告诉了他那是不许可的.I have warned him that it is not allowed....