Introducing existence: There is a book. There are many people.
There + is/are + noun (+ place/time)
There + isn't/aren't + noun; There's no + noun
Is/Are + there + noun?
💡 There is + singular/uncountable. There are + plural. In speech, 'there's' often used with plural too.
✓There are many students in the class.
✗There is many students in the class.
Are with plural nouns.
✓Is there any milk?
✗Has there any milk?
Use is/are, not has/have.
✓There's no time left.
✗There isn't no time left.
There's no = There isn't any.