set up ,set about ,set down ,set out用法?set about ,set out区别?

set up ,set about ,set down ,set out用法?set about ,set out区别?
set up ,set about ,set down ,set out用法?set about ,set out区别?

set up ,set about ,set down ,set out用法?set about ,set out区别?
set up:建立,创立
A new government was set up after the war.
新政府于战后成立.
set down:记下
I have set down all the things that happened.
我已将发生的所有事记了下来.
set out:出发,开始.（后加不定式,即set out to do sth）
He set out to paint the whole house but finished only the front part.
他开始着手粉刷整幢房子,可是只完成了前面的部分.
set about:开始,着手.与set out意思相近（但后加 ing形式,即set about doing sth.）
He set about learning Chinese at age ten.
他在十岁时开始学中文.