Few is less than you want. A few is more so you are happy.
- She has few friends.
(She doesn’t have many friends. She is unhappy.)
- She has a few friends.
(She has friends. She is happy.)
- We have a few minutes left in the lesson. Do you have any questions?
(We have time so please ask me some questions.)
- Few people bought tickets, so the concert was cancelled.
(The concert was cancelled because they didn’t sell many tickets.)