=> It is 11) Samuel started keeping a diary in 1997 Samuel has 12)We started learning English five years ago. We have 13) I began living in Ho Chi Minh City when I was 8. I have 14) She has taught the children in this remote village for five months She started 15) He has not written to me since April. The last time 16) She hasn't had a swim for five years She last 17) They last talked to each other two months ago They haven't 18) The last time she saw her elder sister was in 1999 She hasn't me for years