be different from、set off重点短语详解知识点包括be different from、set off等部分，有关be different from、set off重点短语详解的详情如下：
He finds his daughter is quite different from what she was five years ago.
Some children want to challenge themselves by learning a language different from what their parents speak at home.
differ from＝be different from与……不同
differ in＝be different in在……方面不同
make a difference有影响，使不相同
make some/no/little difference (to...)(对……)有些/没有/几乎没有作用或影响
tell the difference between...and...区分……与……的差别
I'll set off early to avoid the traffic.
A group of boys were setting off fireworks in the street.
Smoke from a cigarette will not normally set off a smoke alarm.
News that the claims might be true set off widespread panic.
set out to do sth.开始做某事
set about (doing) sth.着手(做)某事
1．At first the English spoken in England between about AD 450 and 1150 was very different the English spoken today.
2．As Li Fang set off home, he thought, “...I'll just throw these flowers and chocolates away...”
3．As soon as she got home, my mother set t preparing lunch.
(1)Having said goodbye to their friends, they set off for home.
(2)If a smoke detector sets off an alarm and there is no fire or smoke, inform your hall staff.
(3)Hong Kong's stock market fell, setting off a global financial crisis.
(4)On New Year's Eve, we set off many fireworks, which made the children excited.
5．People living in the city are different those in the countryside in character.