Complete the sentences using the verbs in brackets in Present Continuous or Present Perfect.
Sam (not finish) writing the poem yet. He (work) on the poem for six days.
Ben (look) for his pen, but he (not find) it yet.
Ann (write) a letter to her friend. She (not finish) it yet.
Maggy (wait) for Lilly in the hall. Lilly (not arrive) yet.
Alex (play) the guitar for three hours and he (still play).