PRESENT PERFECT CONTINUOUS
It is used to show an action that started in the past and has continued up to the present moment. We often use for and since when talking about time.
AFFIRMATIVE/POSITIVE
RULE—SUB+HAS/HAVE+BEEN+V1+ING+OB___SINCE/FOR
FOR EXAMPLE
- I have been working as a teacher for 8 years.
- He has been writing his first novel since May.
- Girls have been learning dance for 6 months.
NEGATIVE
RULE—SUB+HAS/HAVE+NOT+BEEN+V1+ING+OB___SINCE/FOR
FOR EXAMPLE
- She has not been replying to me since last night.
- Teachers have not been attending classes for one year.
- I have not been operating a computer for 2 hours.
INTERROGATIVE
RULE—HAS/HAVE+SUB+BEEN+V1+ING+OB___SINCE/FOR?
FOR EXAMPLE
- Have you been watching TV for 4 hours?
- Has he been irritating you for few days?
- Has she been baking cake since 10 O’clock?
INTERROGATIVE NEGATIVE
RULE—HAS/HAVE+SUB+NOT+BEEN+V1+ING+OB___SINCE/FOR?
FOR EXAMPLE
- Have your employees not been working for a week?
- Has she not been doing shopping for two months?
- Has he not been repairing AC since 12pm?
