The sun has set.
注意set后不可再接down。
I have set him a task.
我巳经给他一个任务。
I have set him to a task.
我已经使他开始做一个任务。
The joke set all of us laughing.
这笑话让我们都大笑。
She set her cat to catch mice.
她让她的猫去捉老鼠。
He has set himself to read through the long novel.
他决意要阅读这个长篇小说。