Question

they was gone for a vacation replace was gone​

Answer 1

Answer:

they were gone for a vacation

Answer 2

They have gone for a vacation. -This is the answer.

Rectifying error:

• In the question given, we must replace 'was gone' and also correct it.
• When we are given a sentence to spot the mistake, we must check if there is agreement among the parts of speech in it.
• Especially, the agreement between subject and verb must be looked into.
• Here we have a plural noun 'they' is used and so the verb must be in plural. So we must replace 'was gone' with the correct form of the verb.
• Thus the subject and verb must  agree in person and number.
• In this case, we have the past participle word 'gone'. So the most appropriate form of the verb is 'have gone'.
• Therefore the answer is: They have gone for a vacation.