all you have to do to change a phrase to its relevant future form ,
Make use of the words "will be" or "shall be "
Then change the form of the verb if required
example
1. I am tired .
Future form ,
I will be tired
2. It is shocking .
future form,
It will be shocking
The future perfect tense of "give" is "will have given."
The future perfect tense of "know" is "will have known."
The future perfect tense of "start" is "will have started."
The future perfect tense of "lose" is "will have lost."
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 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'.
The future perfect tense of "wear" is "will have worn."
The future perfect tense of "become" is "will have become."