When do you use "da" versus "di" in Italian? I am trying to figure out something. How do I know when to use "di" versus "da", other than memorizing expressions as they come up? I totally get his concept: una tazza DA caffè (used for) versus una tazza DI caffè (filled with) But...Is this the concept of "for" - purpose? è un gioco DA ragazzi abito DA sera Are there any rules of thumb, or is memorization the only way???? French only has "de" for both uses. Is "da" the equivalent of "por/para" in Spanish? I am so confused. Please help me. Thanks ahead of time.