<p class="ql-block"><br></p><p class="ql-block">英语常见句型解析：</p><p class="ql-block">It is/has been + ... + since</p><p class="ql-block">1. It is/has been + 时间段 + since + 从句（一般过去时）</p><p class="ql-block">1). "It is +时间段+since..." 和 "It has been+时间段+ since..." 二者都可以，但是仅限于时间，因为时间是客观事实。</p><p class="ql-block">2). 如果从句中的动词是瞬间性动词，则从句表示“从该动作开始的那刻起”，意思顺着著翻译即可。</p><p class="ql-block">It is/has been three years since he left Beijing. 自从他离开北京以来已经三年了。</p><p class="ql-block">It is/has been five days since I last saw her. 自从我上次见到她以来已经五天了。</p><p class="ql-block">3). 如果从句中的动词是延续性动词，则从句表示“从这个动作或状态的结束时算起”，所以要翻译成否定意思，即“有多长时间没有……了”。</p><p class="ql-block">How long is it since you were in Beijing? 你离开北京有多久了？</p><p class="ql-block">It is/ has been five years since I was a teacher. 翻译为："自从我不再当老师以来，已经五年了。"或者 "我已经不当老师五年了。"</p><p class="ql-block">备注：我在《牛津高阶英汉双解词典》上看到这样一句话：It's twenty years since I've seen her. 我已经二十年没有见到她了。</p><p class="ql-block">2. It was + 时间段 + since+ 从句 （过去完成时）</p><p class="ql-block">It was five years since I had been a doctor. </p><p class="ql-block">也见过主从句都用一般过去时的。但是这个点很少考。比较常考的还是第1点。</p><p class="ql-block">情景会话：</p><p class="ql-block"> It is just a week since I arrived here.You should get on well with your new classmates.</p><p class="ql-block">我到这里刚好有一星期了。你应该好好地和你的新同学相处。</p><p class="ql-block"> How long is it since you were in Beijing?</p><p class="ql-block">Three years.</p><p class="ql-block">你离开北京多久了？三年了。 </p><p class="ql-block">You look fine today.It is two days since I was ill.你今天看起来气色很好。我已康复两天了。</p>