Dictionary.com
Thesaurus.com

will have been adding

  • future perfect progressive
    of add.
    add
    verb (used with object)
    to unite or join so as to increase the number, quantity, size, or importance.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

When the group’s leaders meet in New Delhi on Thursday, their biggest achievement will have been adding an S: they took on South Africa last year.

From New York Times Mar. 28, 2012