FORM Future Perfect Continuous with "Will"
[will have been + present participle]
Examples:
You will have been waiting for more than two hours when her plane finally arrives.Will you have been waiting for more than two hours when her plane finally arrives?You will not have been waiting for more than two hours when her plane finally arrives.
FORM Future Perfect Continuous with "Be Going To"
[am/is/are + going to have been + present participle]
Examples:
You are going to have been waiting for more than two hours when her plane finally arrives.Are you going to have been waiting for more than two hours when her plane finally arrives?You are not going to have been waiting for more than two hours when her plane finally arrives.
NOTE: It is possible to use either "will" or "be going to" to create the Future Perfect Continuous with little or no difference in meaning.
FORM Future Perfect with "Will"
[will have + past participle]
Examples:
You will have perfected your English by the time you come back from the U.S.Will you have perfected your English by the time you come back from the U.S.?You will not have perfected your English by the time you come back from the U.S.
