.He does mind having been kept to wait outside in such a cold day for several hours.
2.She won't go to attend the meeting unless to be invited.
3.Mrs Smith warned her daughter to never drive after drinking.
4.It was the first time in my life when I had experienced the joy of coming home.
请老师讲一下题中的语法 ，谢谢

1.to wait变成waiting 这是keep sb doing sth 结构
2. 去掉to be 。 unless连词，引起状语从句。这个考查状语从句的省略,= unless she is invited
3. never to 不是to never。 warn sb not to do sth.// warn sb against doing sth 警告/提醒某人不要做某事。 这里用never 替代了not, 语气更强。
4。when 变成that,定语从句，修饰time,先行词前有序数词修饰，用that引导。