Present simple, past simple, present continuous, past continuous, present perfect, present perfect continuous: 1) mr. brown (be) a writer. he (write) detective stories. he (write) books since he was a young man. he already (write) eight books. 2) jess (be) a very good girl. she always (help) her mother about the house. today she (help) her since morning. they already (wash) the floor and (dust) the furniture. now they (cook) dinner together. 3) mrs. davidson (speak) over the phone when the doorbell (ring). 4) john (be) my close friend. i (know) him since 2007. 5) carl (start) learning english six years ago. 6) when i (enter) the room, ann (listen) to music and (surf) the net. 7) while jen (have) a coffee she (read) a magazine. 8) you (leave) the office yet? 9) you (arrive) on time for the meeting yesterday? 10) where you (be) last week? 11) how long you (live) in this village? 12) what you (do)? – i (look) for my wallet. i (look) for it for half an hour already. 13) i (not see) fred for ages. how is he? 14) greg is so unhappy. he just (lose) his passport. 15) he often (take) a packed lunch to school.