According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

According to Cambridge dictionary can be used as used to

show who suffers when something doesn’t operate as it should Example The phone
suddenly went dead on me.
When did their car break down on the way home from work?

In this sentence the people(us) suffered by the calling of cops even before the show had begun. This structure is quite common in informal english but a more appropriate construction would be

He called the cops on us before the show had begun.

How would you describe a typical U.S. university?

Within regard to ever since and since then both the sentences are correct. My sister and I have not replied since I

last texted each other at 4 o’clock, but I hasn’t heard from her since then.

My sister and I last saw each other in 2013 on the internet. What do you think about this? We haven’t seen each other since then!

Ever since is stronger than since then.