5.Completa las oraciones siguientes con have o has para formar el present perfect continuous. 1. 1 has been working all day. has 2. She been studying all morning. 3. You have - been eating the whole time. 4. William has been sleeping for four hours. has been arguing for half an hour. 5. Kate and Rian Conjuga los verbos entre paréntesis en present perfect continuous. 1. David (teach) English since 2006.: David has been teaching English since 2006 2. We (look) for that document all day. 3. Mr Smith (speak) on the phone for two hours. 4. The students are exhausted because they (take) - a difficult test. 5. He - (live) here since he was a child.​