since: 从...以后; 从...时起,强调的是过去某一点之后,或那时和现在之间。 .They left town and haven't been here since. 他们离开了镇子,从那以后再也没有来过这儿
from: 用来表示做为起点的特定地点或时间,强调的是过去某一点。 .walked home from the station; 从家走到车站; .from six o'clock on. 从六点钟开始
第2个回答 2019-03-04
not since 1975 has there been such a time in australian politics. 从1975年以来在澳大利亚政治史上还没有过这样的时刻。 not since the reagan years has a surgeon general been a household name. 自里根时代后,还没有一位家喻户晓的卫生部长。