Question

como ocorre a concordância do verbo there to be?

Answer 1

There is - há, existe-singular There is a pen in the box ZzzzzzzzzzzZZZZZZZZZZZ There are - há, existem-plural There are many books on the table

Answer 2

There is-quando for singular
There are-quando for plural

there is-há,existe
there are-há-existem

there is a cup of coffee on the table
there are glasses on the table