後面接名词或动名词短语：1 Please wait until lunchtime .-------- (lunchtime是名词)-------请等到午饭时间2 Don't get in until being told to .-------- (being told to是动名词)------ 不叫你进去你就不要进去/...第二个句子不是在副词前？get in == go in ，与until没有关系。又如：Don't leave until being allowed to 。
这里，leave == go away. -------in / away的存在与until没有联系。我的意思是，being told to是副词吗？抱歉 英语不好呵呵，理解。
being told to在这里是“动名词”形式。记住，介词不修饰副词。介词後面+名词，代词或者动名词。