过去进行时
过去进行时的时间状语
重要程度：5 分
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<h2>过去进行时的时间状语</h2>
<p>过去进行时表示在过去某一时刻或某一段时间内正在进行的动作。通常与以下时间状语连用：</p>
<ul>
<li>at this time yesterday</li>
<li>at that time</li>
<li>from nine to ten last evening</li>
<li>when he came in</li>
<li>while they were waiting for the bus</li>
</ul>
<h3>例题说明</h3>
<p><strong>例题1：</strong></p>
<p>当时我正在写报告。</p>
<p>用过去进行时表达为：I was writing the report at that time.</p>
<p><strong>例题2：</strong></p>
<p>昨天晚上九点到十点我在看书。</p>
<p>用过去进行时表达为：I was reading a book from nine to ten last evening.</p>
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