For example, years ago the lumberjack used a cross-cut saw to cut down their trees, and now days we use the chainsaw.
(the lumberjack; used; a cross-cut saw to cut down their trees; T:years ago) (we; use; the chainsaw; T:now; T:days)
the lumberjack we
used use
a cross-cut saw to cut down their trees T:years ago
the chainsaw T:now T:days