Question

In which sentence is the underlined verb in the future perfect progressive tense?



At the age of five, she *will visit* New York City.


By the age of five, she *will have visited* New York City.


She *will have been visiting* New York City for a week when she turns five years old.


She *will be visiting* New York City when she turns five years old.

Answer 1

The third sentence: "She *will have been visiting* New York City for a week when she turns five years old."

Reason: the future perfect progressive (continuous) uses "will have been" + present participle (verb+ing) to show an action's duration up to a future point.