In English, we often use "for" or "to" when talking about doing favors or giving things. Swedish splits these concepts into three distinct prepositions depending on your exact intention: till, åt, and för.
The Physical Recipient: Till
Use till when an item is physically changing hands or moving toward a recipient. Think of it as the direct translation of "to."
| I am giving the shopping bag to the customer. | Jag ger kassen till kunden. |
| Can you deliver the food to them? | Kan du leverera maten till dem? |
Doing Favors: Åt
When you run an errand, carry a heavy bag, or do a chore so that someone else does not have to, use åt. It means you are performing the action on someone's behalf.
| Can you carry the shopping bag for me? | Kan du bära kassen åt mig? |
| Can I run the errand for you? | Kan jag göra ärendet åt dig? |
| I had time to walk the dog for you. | Jag hade tid att rasta hunden åt dig. |
Benefit and Interest: För
Use för when a situation is generally in someone's best interest, or when describing what is "good for" or "important for" a person or group. Unlike åt, it does not imply you are substituting for them to do a physical chore.
| It is better for him that you shop. | Det är bättre för honom att du handlar. |
| The effort is important for the association. | Insatsen är viktig för föreningen. |
Putting It All Together
It is very common to combine these prepositions when describing acts of kindness. Just remember the core roles: för is the general benefit, åt is the labor you take off their hands, and till is the physical handover.
| The medicine is good for her, so I am fetching it for her. | Medicinen är bra för henne, så jag hämtar den åt henne. |
| I bought the coffee for him and gave the cup to her. | Jag köpte kaffet åt honom och gav koppen till henne. |