Complete the following sentences using the perfect continuous tense form of the verbs in brackets.
1. Mrs Rose _____ (teach) English for ten years.2. Her grandma _____ (talk) for three hours3. A little boy _____ (stand) at the door since noon 4. I want to help Kelly. She _____ (nit work) for months5. A strange man _____ (follow) us for hours6. The baby _____ (cry) for fifteen minutes7. How long _____ (Dan drive)?8. _____ (you watch) me?