Identify the tense in "Jack will not have learnt anything if he doesn't go to class."

The sentence "Jack will not have learnt anything if he doesn't go to class" demonstrates the Future Perfect tense. This tense is used to describe an action that will be completed at some point in the future before another specified future event or time.

In this context, "will not have learnt" indicates that by a certain future time—implied by the scenario of not attending class—Jack's learning will not yet be accomplished. The structure of the Future Perfect tense typically follows the form of "will have" plus the past participle of the main verb, which in this case is "learnt."

Understanding this tense is important in establishing timelines within a sentence, especially when discussing future actions that depend on certain conditions, as seen with "if he doesn't go to class." Thus, the option that correctly identifies the tense in the given sentence is indeed the Future Perfect.