Present Perfect Continuous Tense

Present Perfect Continuous Tense is used to mean an action of a verb that started in the past and that work is still going on.

For example: 

• It has been raining for two hours. (Here the rain started two hours ago and still it is raining)
• They have been playing cricket since morning. (Here they started playing before and still playing)

Structure:

Subject + have been/ has been + (V1+ing) +Object

• She has been cooking for an hour. 
• He has been waiting for her mother for a long time.