With a tag:

They should have arrived here by now, _______?

addition-conjunct

unit noun

Using inversion:

You can’t cheat under any circumstance.

Please list the two basic uses of the past perfect. Give an example for each.

Using extraposition:

You keep biting your nails and I find it disgusting.

Reinforcing the negation:

No employee in the company wants to travel on business very often.

Using transferred negation:

I think that John won’t come to the party tomorrow.

Using coordination:

The teacher went into the classroom. He opened his notebook. He started the lecture.

Using subordination:

A supplier wants an independent reference about a customer’s business standing. A supplier may refer to a trade association.

Using a relative clause:

I was the boss man. I had to keep a clear mind at the critical moment.