Let's go to the circus!
That compact car belongs in the circus!
We're going to the circus today."We're" is the attraction of "we" and "are", put together. Therefore the above sentence is the same as:We are going to the circus today.
last night I went to the circus with my friends
I saw an elephant in a tutu at the circus.
where did i put my reading spectacles? (as in 'glasses') "The circus certainly was a spectacle to see."
This ticket is redeemable at any circus.
Their was so many cool performers in the circus.
The elephant at the circus was painted pink.
The word circus is a singular noun. You would use the third-person singular pronoun: it.
I went to the circus and saw horses prance around the ring.
I put the word wool in a ten word sentence.
see How do you put the word countries in a sentence?
The word is put in a sentence like I just did right now.