Great changes have taken place in China since its opening up and reform began.
Few people believe the claim that the cost of living has not risen since last year.
Our problems have multiplied since last year.
in the past ten years
since the beginning of spring
ever since the ancient times
- Note"以来" is different from "以后". "以后" is used in a wide range, which can mean the time from the past, the present or the future; "以来" cannot mean the time from the present or the future.