例句：

　　可用于向某人提供某物或邀請某人做某事。

　　You use "Can I", "Could I", and "Shall I" when you offer to help someone.

　　這一問題詢問一個原因，由于目的提供了第一位的答案，因此它是第一因，而其名副其實也一目了然，因為如果我們問：某物為何產(chǎn)生了一個結(jié)果？

　　Which question calls for a cause. Now since the end provides the first answer, it will be the first cause. That it really does so is evident, for if we ask: Why does something produce an effect?