a couple of years ago,some years agoit has been several years since....建议你复述整个句子，学习这样的表达。不要鼓励记忆单词，词组和一些“说法”
few years ago
如果知道是几年，就用xx years ago(xx表示年数)如果不知道具体是几年，就用：a few years ago或者several years ago
SEVERAL YEAR AGO,我记得这里应该是没S的,
a few years ago = several years ago = years before （=many years ago） = years ago (但通常放在句尾作为时间副词)
a few years ago
few years agofew years backseveral years back
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nancyding0696
