Find the correct sentence from the given options.

Correct answer: The sentence 'By next week, Karan will have been working in TCS for 15 years.'

Explanation – This sentence correctly uses the future perfect continuous tense to show an action that continues up to a point in the future.

Form: will + have + been + verb-ing

• Use when you want to show the duration of an activity up to a specific future time (e.g., 'By next week').

• In the sentence, 'will have been working' expresses the continuous action and 'for 15 years' gives the duration ending at the specified future time.

• Therefore the sentence is grammatically correct and natural.

Common errors in the other sentences and corrections:

• Original: 'You have been worked here since last year.' Correction: 'You have been working here since last year.' or 'You have worked here since last year.' Reason: 'have been worked' is ungrammatical; use present perfect continuous or present perfect with 'since'.

• Original: 'I will have been played for a year when I complete the age of 23.' Correction: 'I will have been playing for a year when I turn 23.' Reason: use the active continuous form 'playing' and the natural phrase 'turn 23'.

• Original: 'She writes novels since her college time.' Correction: 'She has been writing novels since college.' or 'She has written novels since her college days.' Reason: use present perfect (continuous) with 'since' to show an action that started in the past and continues.