... writing to her son, Thomas, who is a student Write the most suitable present perfect form (simple or continuous) using the words in brackets Dear Thomas, It be) It has been several weeks since ... using the verb in the correct tense Look! Someone (break) that window! You look tired (you/ work) hard? “ (you/ ever / work) in a factory?” “No, never.” “Jane ... up yet 11 We (know / not) them for a long time 12 She (hang / not) up all the pictures yet 13 How long _ (wait / she) for us? 14 How many times ...