翻译下列句子，并指出所用介词短语在句子中的语法功能。

1.A gentleman in white walked into the hall.介词短语in white作后置定语，修饰a gentleman。

2.Jenny is younger than that of her real age.介词短语of her real age.作后置定语，修饰that（指代Jenny的容貌）。

3.Because of the heavy rain, we can't go out.介词短语Because of the heavy rain做原因状语。

4.You will find that he is at work.介词短语at work在从句中做表语。

1.A gentleman in white walked into the hall.介词短语in white作后置定语，修饰a gentleman.
2.Jenny is younger than that of her real age.介词短语of her real age.作后置定语，修饰that（指代Jenny的容貌）
3.Because of the heavy rain, we can't go out.介词短语Because of the heavy rain做原因状语
4.You will find that he is at work.介词短语at work在从句中做表语