Question

rule of future perfect continuous tense .

Answer 1

✌️✌️ hey frnds.......



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Future perfect continuous tense :--


[ subject + will/ shall + have been + verb (1st form) + ing + object + for/since + time ]



we use this structure when we make sentences of future perfect continuous or progressive tense .....


I explained this tense in this pic and also give some related examples ...


I hope it's helpful ☺️☺️✅

Answer 2

$namaste$

How to know sentence is future perfect continuous tense----

Future perfect continuous tense are rarely used in daily life, as mostly sentences are given as present or past tense. The future perfect continuous tense is used for actions that will begin before a certain time in the future and end after it. 
Those sentences are of future perfect continuous tense.

$rules$
Subject + wil/shall +have + been + verb1 +ing +object + time phrase.

$examples$

1.Ram will have been going to market on friday.

2.He will have been playing Cricket on next sunday.

3.Mother will have been cooking food by this time tomorrow.

4.Sita will have been waiting for Ram for many years. etc.

I hope helps you

By SARVESH