Difference Between Imperfect and Imperfect Continuous

FUNCTION:

• It is used to express the 'idea' that an action/event is predicted, planned, promised, expected or obliged to have been being continued at some certain time in the future or while another action/event happens later in the future.

The action/event can refer to an action/event which started in the past or which will start in future, and the length of time (duration) since the time when an action/event started until the time when the other action/event happens is supposed to be specified, except we mention 'since' or 'until.'

• It is also used to express the 'idea' that an action/event/situation is predicted or planned to most-likely have been being continued at some  certain time in the future, or while another action/event happens later in the future.

* Time adverbs which can be used: {by tomorrow morning, when, etc..}
* Mostly continuous and normal verbs are used.

FORMULA AND EXAMPLES:

Positive:
(I) Subject + [shall/will] + have been + verb_ing + {adverbs}
(A) Subject + [shall/will] + have been + verb_ing + {objects/adverbs}
(P) Subject + [shall/will] + have been + being + verb-pp + {by objects/adverbs}
(I) I shall have been working in a good company before next-month. (Obligation)
(I) I will have been sleeping for 8 hours when you wake me up tomorrow morning. (Plan)
(A) We shall have been collecting the data before next Monday. (Obligation)
(A) She will have been studying English for two years in January 2010. (Prediction)
(P) The ordered items shall have been being delivered before tomorrow afternoon. (Obligation)
(P) The dinner will have been being cooked before we come home this evening. (Plan)

(I) Subject + [am/is/are] + going to + have been + verb_ing + {adverbs}
(A) Subject + [am/is/are] + going to + have been + verb_ing + {objects/adverbs}
(P) Subject + [am/is/are] + going to + have been + being + verb-pp + {by objects/adverbs}
(I) ......................................................................... (Plan)
(I) ................................................................ (Prediction)
(A) ......................................................................... (Plan)
(A) .................................................................. (Prediction)
(P) ......................................................................... (Plan)
(P) .................................................................. (Prediction)

Negative:
(I) Subject + [shall/will] not + have been + verb_ing + {adverbs}
(A) Subject + [shall/will] not + have been + verb_ing + {objects/adverbs}
(P) Subject + [shall/will] not + have been + being + verb-pp + {by objects/adverbs}
(I) We shall have not been walking for more than 15 minutes when we arrive at home. (Prediction)
(I) I will have not been working in the company until next week. (Prediction)
(A) They won't have been playing football before 3 pm afternoon. (Prediction)
(A) We will not have been purchasing anything until we get the money. (Plan)
(P) This house won't have been being renovated before end of year. (Prediction)
(P) Your lap-top won't have been being repaired until 10 tomorrow morning. (Plan)

(I) Subject + [am/is/are] not + going to + have been + verb_ing + {adverbs}
(A) Subject + [am/is/are] not + going to + have been + verb_ing + {objects/adverbs}
(P) Subject + [am/is/are] not + going to + have been + being + verb-pp + {by objects/adverbs}
(I) ......................................................................... (Plan)
(I) ................................................................ (Prediction)
(A) ......................................................................... (Plan)
(A) .................................................................. (Prediction)
(P) ......................................................................... (Plan)
(P) .................................................................. (Prediction)

Interrogative:
(I) [Shall/Will]{not} + subject + have been + verb_ing + {adverbs}?
(A) [Shall/Will]{not} + subject + have been + verb_ing + {objects/adverbs}?
(P) [Shall/Will]{not} + subject + have been + being + verb-pp + {by objects/adverbs}?
(I) Shall I have been waiting here for an hour when the train comes? (Prediction)
(I) Will we have been passing across that street before 8 pm tonight? (Plan)
(A) Will he have been teaching English for 6 years by the end of this year? (Prediction)
(A) Will you have been translating this document before I come back to office? (Plan)
(P) Will the software have been being installed before I get there? (Plan)
(P) Won't my shirt have been being ironed before I leave tomorrow? (Plan)

(I) [Am/Is/Are]{not} + subject + going to + have been + verb_ing + {adverbs}?
(A) [Am/Is/Are]{not} + subject + going to + have been + verb_ing + {objects/adverbs}?
(P) [Am/Is/Are]{not} + subject + going to + have been + being + verb-pp + {by objects/adverbs}?
(I) ........................................................................................? (Prediction)
(I) ...........................................................................................? (Plan)
(A) ........................................................................................? (Prediction)
(A) ........................................................................................? (Plan)
(P) .......................................................................................? (Plan)
(P) ........................................................................................? (Plan)

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Source: https://sites.google.com/site/tenseofibad/future-imperfect-continuous-tense