请教这两个句子中for和of有何区别
1、Eleveno'clock,approvethesketchesforthetoyspaceship.
2、Samhandsherasketchofthetoyspaceship.
这两句中的thesketchesforthetoyspaceship和asketchofthetoyspaceship意思都是“玩具太空船草图”,用“for”和用“of”有什么区别吗?