This is a big decision; I'll need some more time.
Our big tree fell over during last night's storm.
I made a mistake by missing the deadline for the project.
She forgot her lunch, so she had to make up for it by eating a big dinner.
Big is a predicate adjective. Any word on the other side of the word is or its equivalent when the word is does not happen to be used as a helping verb is either a predicate nominative (noun) or adjective. Jane is a girl. Girl is a noun. Jane is pretty. Pretty is an adjective. (That is one quick way to tell if a word is an adjective!
Donald Trump's jingoism is a big turn-off.
Racial inequality was a big problem in the late 1800's and most of the 1900's.
there was a big tidal wave
There used to be a big empire in Rome.
Her ego is far too big.
In a mighty and powerful kingdom, there was a big, old man...
The big house with high cielings and spiral starecase was luxurious.
give me a sentence for the word retract Big magnet retract other magnets together.
a good cold weather supper is a big bowl of Irish stew.
"The stars are obscured by the clouds"; "the big elm tree obscures our view of the valley"
I made a mistake by missing the deadline for the project.
Meet me at the lagoon! Let's go swimming in the lagoon. Look at that big crocodile in the lagoon!
Chicago is a big city
"The big scary butterfly intimidated me."