Use of the present perfect continuous tense

- Use of since in present perfect continuous tense
- Structure of the present perfect continuous tense
- Example of the present perfect continuous tense
- Definition of the present perfect continuous tense
- Formula of the present perfect continuous tense
- Usage of the present perfect continuous tense
- Rule of the present perfect continuous tense
- Form of the present perfect continuous tense
- Formation of the present perfect continuous tense