What is the tense of the verb in the following sentence? i will have been here for over four hours by lunchtime.?

The tense in the sentence is future perfect simple

Explanation:

The structure that a future perfect simple sentence follows is subject + will + have + participle, this tense is used to talk about something that is supposed or expected to be done before a specific moment in time in the future. The sentence "I will have been here for over four hours by lunchtime" means that the subject will arrive 4 hours earlier to the place that the specific moment in the future they mention.

the book's theme is the moral ambiguity of the iranian revolution, history of middle eastern relations and the process of growing up during war. it sheds light on the stereotypical views of middle eastern culture and religion.

the author explicitly portrays the issues of class disparities and racism continously throught the whole novel.

the relationship between parents and childrens, the abandonment of faith, modernity vs fundamentalism and class conflict are the 4 main panels that this novel englobes.

hope this , if you would like me to be more specific about a specific excerpt let me know : )