The key to exercise solutions in chapter 6 - Grammar for the textbook New Headway Intermediate - Workbook with authors Liz Soars, John Soars and Paul Hancock from Oxford University Press
Question
Rewrite the sentences using the words in brackets.
Answer
a) She's been in Germany since April.; b) She's been in Germany for two months.; c) She went to Germany two months ago.
a) I haven't seen him since 2014.; b) I haven't seen him for X years.; c) I last saw him X years ago.