Answers

2015-01-08T15:59:49+08:00
The FUTURE PERFECT TENSE indicates that an action will have been completed (finished or "perfected") at some point in the future. This tense is formed with "will" plus "have" plus the past participle of the verb (which can be either regular or irregular in form): "I will have spent all my money by this time next year.
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2015-01-08T20:33:08+08:00
This tense is used when an action will happen sometime or at some point in the future.

It's format is:
Will + Have + verb in past participle

Examples:
I will have finished that book by tomorrow.
She will have completed her task at about 6 o'clock.
 
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