{{Grammar Box}} 白 (bái) doesn't only mean "white." When added before a verb it means to do that verb "in vain" or "with no effect." In a certain way, you can think of 白 as not being just "white" but also "blank," like when you do something for a long time without thinking, and you're just going through the motions. It's like doing something with a "blank" mind. == Structure with just 白 == All you have to do is but 白 before the verb.One important thing to note is that 白 is usually used with mono-syllabic words, like 帮, 做, 学 etc. You cannot put a 地 after 白.