Final answer:
The present perfect tense is used to describe an action that started in the past and is still happening, while the present perfect continuous tense emphasizes the duration of the action.
Step-by-step explanation:
The present perfect tense is used to describe an action that started in the past and is still happening, or an action that happened at an unspecified time before now. For example, 'John has been waiting at the bus stop.' The present perfect continuous tense is used to describe an action that started in the past and is still happening, with an emphasis on the duration of the action. For example, 'Shelly has been driving to Newcastle since 13:00.'
Learn more about verb tenses