［动词的时态］since的四种用法
<p> 1） <span word="since">since</span> +过去一个时间点（如具体的年、月、日期、钟点、1980， <span word="last">last</span> <span word="month">month</span>， <span word="half">half</span> <span word="past">past</span> <span word="six">six</span>）。例如：</p><p> <span word="I">I</span> <span word="have">have</span> <span word="been">been</span> <span word="here">here</span> <span word="since">since</span> 1989. 1989起，我一直在这儿。</p><p> 2） <span word="since">since</span> +一段时间+ <span word="ago">ago</span>.例如：</p><p> <span word="I">I</span> <span word="have">have</span> <span word="been">been</span> <span word="here">here</span> <span word="since">since</span> <span word="five">five</span> <span word="months">months</span> <span word="ago">ago</span>. 我在这儿，已经有五个月了。</p><p> 3） <span word="since">since</span> +从句。例如：</p><p> <span word="Great">Great</span> <span word="changes">changes</span> <span word="have">have</span> <span word="taken">taken</span> <span word="place">place</span> <span word="since">since</span> <span word="you">you</span> <span word="left">left</span>. 你走后，变化可大了。</p><p> <span word="Great">Great</span> <span word="changes">changes</span> <span word="have">have</span> <span word="taken">taken</span> <span word="place">place</span> <span word="since">since</span> <span word="we">we</span> <span word="were">were</span> <span word="here">here</span>. 我们走后，变化可大了。</p><p> 4） <span word="It">It</span> <span word="is">is</span> +一段时间+ <span word="since">since</span>从句。例如：</p><p> <span word="It">It</span> <span word="is">is</span> <span word="two">two</span> <span word="years">years</span> <span word="since">since</span> <span word="I">I</span> <span word="became">became</span> <span word="a">a</span> <span word="postgraduate">postgraduate</span> <span word="student">student</span>. 我考上研究生有两年了。 </p><p> </p>
页:
[1]