Future Perfect Continuos

Future Perfect Continuous

As the future perfect this is a grammatical structure that sometimes I can find a little bit difficult to find a specific situation in which I can apply it. For intanst I do not practice it currently.

Grammatical Structure 

Positive 

Subject + will have been + verb + ing
Subject + to be + going to have been + verb + ing

Examples: 

I will have been making a troubleshooting in the computer for 20min by the time the leads ask me to give call back 

I am going to have been making a troubleshooting in computer for 20min by the time the leads ask me to give call back 

Negative

Subject + will +not + have been + verb + ing 

Subject + to be + not + going to have been + verb + ing

Examples:

We will not have been working so hard by the time we leave home. 

We are not going to have been working so hard by the time we leave home.

Interrogative

Will + subject + have been + verb + ing?

To be + subject + going to have been + verb + ing? 

Examples:

Will you have been working late by the time we are at the party?

Are you going to have been working late by the time we are at the party?

Uses
1. Describes actions that will continue up until a point in the future