其中的不定式为目的状语，也可将不定式移至句首：

Love alone is insufficient to lead a good life. 光有爱还不足以过上美好的生活。

=To lead a good life love alone is insufficient. 要想过上美好的生活，光有爱还不够。

又如：

His salary is insufficient to meet his needs. 他的薪水入不敷出。

The heating is insufficient to kill the bacteria. 加热不足以杀死这种细菌。

Her income is insufficient to support a family. 她的收入不够养活一家人。

The animals’ feed is insufficient to last the winter. 动物的饲料不够过冬用的。

The data we have is insufficient to draw any conclusions. 我们掌握的数据不足以得出任何结论。