while在时候情况下有though的含义呢?

Gordon-Levitt's late grandfather Michael Gordon was a director of plays and films,a few of which won Academy Awards.这句话中的late 为什么看不懂late在句中的意思?
u sure are taking a lot of pictures.和 u are sure taking a lot of pictures.是一样的句式吗?sure可以这样使用吗?
around 600,000 of thouse  die from second hand smoke alone.此句中alone怎么理解?
请英语高手们给我讲的白话一点,因为我英语实在是太差了…………拜托各位了~聊表心意.
一共是4个问题 忘记打题号了~请大家别看混了