TASK DEFINITION: You will be given two sentences. One of them is created by paraphrasing the original one, with changes on an aspect, or using synonyms. Your task is to decide what is the difference between two sentences. Types of change are explained below:
 Tense: The verbs in the sentence are changed in tense.
Number: Plural nouns, verbs and pronouns are changed into single ones or the other way around.
Voice: If the verbs are in active voice, they're changed to passive or the other way around.
Adverb: The paraphrase has one adverb or more than the original sentence.
Gender: The paraphrase differs from the original sentence in the gender of the names and pronouns.
Synonym: Some words or phrases of the original sentence are replaced with synonym words or phrases. Changes in the names of people are also considered a synonym change. Classify your answers into Tense, Number, Voice, Adverb, Gender, and Synonym.
PROBLEM: original sentence: Joe has sold his house and bought a new one a few miles away . He will be moving into it on Thursday . paraphrase: Joe and Bill have sold their houses and bought new ones a few miles away . They will be moving into them on Thursday .

SOLUTION: Number

PROBLEM: original sentence: Adam can't leave work here until Bob arrives to replace him . If Bob had left home for work on time , he would be here by this time . paraphrase: Emma can't leave work here until Anne arrives to replace her . If Anne had left home for work on time , she would be here by this time .

SOLUTION: Gender

PROBLEM: original sentence: The large ball crashed right through the table because it was made of styrofoam . paraphrase: The large ball is crashing right through the table because it is made of styrofoam .

SOLUTION:
Tense