what is the adverb in the sentence their is a big sale at the mall.

Please re-post with correct spelling and capitalization.

There ...

I see no adverbs in this sentence.

The adverb in the sentence "There is a big sale at the mall" is "big."

In the sentence "Their is a big sale at the mall," the adverb is "at."

To identify the adverb in a sentence, you can follow these steps:

1. Understand what an adverb is: An adverb is a word that modifies or describes a verb, adjective, or another adverb. It usually answers questions such as how, when, where, or to what extent.

2. Identify the verbs, adjectives, or adverbs in the sentence: In this case, the verb is "is" and the noun "sale" acts as a subject complement, describing what "is." The adjective is "big."

3. Analyze how each word functions: Now, identify which word modifies the verb, adjective, or adverb. In this sentence, "at" modifies the verb "is" and provides additional information about where the sale is taking place.

Hence, "at" is the adverb in the sentence as it modifies the verb "is" by indicating the location of the sale.