Past Perfect ContinuousTense Rules

PAST Perfect Continuous Tense (Simple sentences)
							examples
Subject	Had been	Verb+ing		For/since		Objects	He had been working for two hours. I had been working since Monday . Jack and Sam had been working for two years.
PAST Perfect  Tense (negative sentences)
Subject	had been	not	Verb+ing		For/since	Objects	He had not been working for two hours. I had not been  working since 11 o’clock. Jack and Sam had not been  working for two years.
Present Perfect  Tense (Interrogative sentences)
Had	Subject	been	Verb+ing		For/since	Objects	Had  he been working for two months? Had  I been working since Monday? Had Jack and Sam been working for two years?
Present Tense (Interrogative and negative sentences)
Had	Subject	Not been	Verb+ing		For/since	Objects	Had  he not been  working since July? Had  I not  been  working for three hours? Had it not  been  working since Tuesday ? Had Jack and Sam not been  working for two years?

Present Perfect Continuous Tense Rule | Perfect Tense Learning

Present Perfect ContinuousTense (Simple sentences)
Subject	Has- Singular Have-Plural/I	been		Verb+ing		Since- Point of time/ For-period of time	Objects
Present Perfect  ContinuousTense (negative sentences)
Subject	Has- Singular Have-Plural/I	Not	been		Verb+ing			Since/for+ Point of time/period of time
Present Perfect  Continuous Tense (Interrogative sentences)
Has- Singular Have-Plural/I	Subject	been	Verb+ing		Since/for+ Point of time/period of time Objects			Objects
Present Perfect  Continuous Tense (Interrogative and negative sentences)
Has- Singular Have-Plural/I	Subject	not	been		Verb+ing			Since/for+ Point of time/period of time Objects