To see if a sentence is correct, a person can use a grammar checker such as Grammarly or Paper Rater. Grammarly, which allows for a free check of a sentence, can determine more than 250 kinds of errors including article use.
Grammarly can also suggest a good choice of words to be used in the sentence to convey the right meaning or for better readability. To use Grammarly, a person can type the sentence directly into the box and click the "Check your text" icon. Paper Rater, which also allows for a free check of a sentence, gives a report about the sentence that was analyzed according to the requested grade or education level. Both Paper Rater and Grammarly can also detect online plagiarism of the particular sentence.