since three years ago 句子要用在 现在完成里吗?

问题描述：

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 ago
I 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?
1个回答 分类：英语 2014-11-12

问题解答：

我来补答
1.自从一段时间前以来since two years ago--自从两年前以来
2.大部分情况下用现在完成时态,也可以用一般现在时态.
It's 10 years since we came here a year ago.
It has been 10 years since we came here a year ago.
 
 
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