* She started to work here 2 months ago. => She has worked here for 2 months.
 * We began to swim when it started to rain. => We have been swimming since it started to rain.
 * This is the first time I have listened to this piece of music. => I have never listened to this piece of music before.
 * I have written this report for 2 days. => I started writing this report 2 days ago.
 * I last went out with her when I was in Hanoi. => I haven’t gone out with her since I was in Hanoi.
 * The last time she talked to me was 5 months ago. => She hasn’t talked to me for 5 months.
 * It is a long time since we last saw him. => We haven’t seen him for a long time.
 * When did you buy it? => How long is it since you bought it?
 * I haven’t seen him for many days. => The last time I saw him was many days ago.
 * I haven’t taken a photo for 3 days. => It is 3 days since I took a photo.