Please correct the sentences grammar: ? Jill went to the store too by a couple apple. The fruits where really over priced their. She latter walked down to another store and bought some fruit there.

1 Answer
  1. Jill went to the store to buy a couple of apples.
  2. The fruit was really overpriced there .
  3. She later walked down to another store and bought some fruit there.

Explanation:

Sentence 1:
The word used to indicate an infinitive verb is to, spelled with one "o". The adverb "too" modifies a verb as very, excessively, extremely, etc.
The verb meaning to purchase is spelled buy. The word "by" functions as an adverb or a preposition.
The noun "couple" means two, requiring the plural form of the noun apples.
In the verb phrase "to buy a couple of apples", the preposition "of" is used to form a prepositional phrase. In informal speech, the sentence may be spoken as "a couple apples'.

Sentence 2:
Although Jill wanted to buy two apples, the noun fruit in an uncountable (mass) noun; a type of noun called an aggregate noun, a word representing an indefinite number of elements. The plural noun "fruits" is a word exclusively for "types of" or "kinds of" fruit. Jill was going to purchase apples only.
The word "where" is an adverb or a conjunction, not a verb. The correct verb for the uncountable subject noun "fruit" is was, the past tense of the verb "is".
The word overpriced is a closed compound adjective, not two words.
The word "their" is a pronoun called a "possessive adjective" used to describe a noun as belonging to two or more people or things. The word there is an adverb, modifying the adjective "overpriced" as "in that place".

Sentence 3:
The word "latter" is an adjective used to describe a noun as the second mentioned of two people or things. The adverb later modifies the verb "walked" as coming after something in time.