sentence: It has always been very useful since a long time ago . Nevertheless , nowadays , there are some people who ask whether if public transport was suppressed , society would save a lot of money .
modified: It has ever been very useful for a long time ago , nevertheless nowadays , there are some people who ask if the public transport was suppressed , and society would save a lot of money .
transformation: ADV, PREP, PUNCT, PUNCT, PREP, DET, CONJ