判断下面句中动词不定式的功能：

The country is known to be rich in natural resources．

判断下面句中动词不定式的功能：

Do you have anything else to add?

判断下面句中动词不定式的功能：

He came here to borrow my bike．

判断下面句中动词不定式的功能：

To scold her would not be just．