Present Perfect ContinuousTense (Simple sentences)
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Subject
Has- Singular

Have-Plural/I
been
Verb+ing
Since-
Point of time/
Forperiod 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
READ :  NCERT Maths, Class 6, Fractions, Part 1