Question

They will be leaving for Kolkata tomorrow change to present perfect

Answer 1

Explanation:

ANSWER

ANSWERThe future perfect tense form of a verb is used to describe an event that is expected or planned to occur before a time of reference in the future. In the given sentence, 'before we reach the station' indicates an event that will occur or is expected to occur in the future. 'Will have' is a verb form used to indicate future present perfect tense and so the most appropriate answer is A) will have left.

Answer 2

Explanation:

$\huge\bf\mathcal\blue{AnsWer:}$

They have left for Kolkata tomorrow.