1. We started cleaning my kitchen at 5 o'clock. We're still cleaning(since). -> 2. Nam's still studying English. He started studying it two years ago.(for) -> 3. I started learning how to play tennis three months ago.I'm still learning it. (for) -> 4. He attended two academic courses: one in 2011 and the other in 2013.(twice) -> 5. They visited this heritage site in 2009, 2010 and 2012( three times) -> 6. She started her research project last month. She's still doing it. -> 7. Mary is staying at a homestay during her undergraduate programme. The programme began three weeks ago.(for) ->