爱上海后花园

since three years ago 句子要用在 现在完成里吗?We __B__ english since three years ago.A.learned B.have learned Tom has been in Paris since 2 years agoI have been here since five months ago.问:1.since+时间+ago 在句子里怎么翻译,表示:已经多少年了,还是表示 自从多少年前?2.这种句型都用在现在完成时吗?

1sincetwoearsago2It\s10earssincewecamehereaearagoIthasbeen10earssincewecamehereaearago...

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