FOR

For主要跟在下面這些名詞的后面：

* a check for (amount of money)
例句: She gave me a check for $50.
她給了我一張50塊錢的支票。

* a demand for something
例句: Unfortunately, there wasn't enough demand for our product.
不幸的是，我們的產品市場需求不大。

* a need for something
例句: There is a real need for discipline in this class.
這個班級，沒紀律不行。

* a reason for something
例句: I have a reason for doing that!
我這么做是有理由的。