who cooked this salad ?
who made this salad ?
cook = 用火加热来烹饪
your coat is broken.
your coat is torn.
broken = 坏掉了（break的过去分词）
the floor was covered in broken glass.
torn = （布和纸）磨损，破洞（tear的过去分词）
my jacket caught on a nail and tore.
it was still bright outside.
it was still light outside.
bright = 明亮的，通透的（光线充足）
the weather was bright and sunny.
light = 光线，光亮（强调有光）
we could see light coming from under the door.
little children are difficult to understand that.
it is difficult for children to understand that.
it is + 形容词 + for sb/sth = 对sb/sth来说……
it's very important for students to listen to teachers carefully.