1. We must be quick. We have little time.
(Use "little" with uncountable nouns like "time" to mean "not much.")

2. Listen carefully, I’m going to give you a little advice.
(Use "a little" with uncountable nouns like "advice" to mean "a small amount.")

3. Do you mind if I ask you a few questions?
(Use "a few" with countable nouns like "questions" to mean "a small number.")

4. This town is not a very interesting place to visit, so few tourists come here.
(Use "few" for countable nouns like "tourists" to mean "not many.")

5. I don’t think Jill would be a good teacher. She’s got little patience.
(Use "little" with uncountable nouns like "patience" to mean "not much.")