## Subject-predicate constructions as modifiers

An entire subject-predicate construction (a sentence or clause) such as
我給她打電話, 他今天買, 我們去北京參觀 can be used as a modifier for a
noun. When used this way, there must be a 的 inserted between the
construction and the noun it modifies:

    我給她打電話的時候﹐她正在吃飯。
        When I called her, she was eating.
    他今天買的花兒很漂亮。
        The flowers he bought today are very pretty.
    請你們看我們去北京參觀的照片。
        Please take a look at the pictures we took while visiting Beijing.
    這是誰給你寫的信﹖
        Who wrote this letter to you?

The subject-predicate construction always goes immediately before the
的, which goes immediately before the noun to be modified.