No, the sentence "By that time he will have been gone for three days" is in future perfect continuous tense.
The future perfect tense of "give" is "will have given."
The future perfect tense of "realized" is "will have realized."
The future perfect tense of "cry" is "will have cried."
The future perfect tense of "lose" is "will have lost."
No, the sentence "By that time he will have been gone for three days" is in future perfect continuous tense.
The verb tense in the sentence is future perfect tense. It indicates an action that will be completed at some point in the future before another specified time.
The future perfect tense of "give" is "will have given."
The future perfect tense of "realized" is "will have realized."
The future perfect tense of "cry" is "will have cried."
The future perfect tense of "lose" is "will have lost."
The future perfect tense of "start" is "will have started."
The future perfect tense of "know" is "will have known."
The future perfect tense of be is will have been.
The future perfect tense of be is will have been.
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
The future perfect tense of 'drive' is 'will have driven'.