初中英语时态知识点：过去进行的结构
<p> 过去进行时的结构及句型变化</p><p> 过去进行时由<span word="was">was</span> / <span word="were">were</span> + 现在分词构成。如：</p><p> <span word="I">I</span> <span word="was">was</span> <span word="doing">doing</span> <span word="my">my</span> <span word="lessons">lessons</span> <span word="then">then</span>. 那时，我在做功课。</p><p> <span word="We">We</span> <span word="were">were</span> <span word="cleaning">cleaning</span> <span word="the">the</span> <span word="house">house</span>. 我们在打扫房子。</p><p> 过去将来时态的肯定句、否定句和疑问句形式：</p><p> 肯定句例句：<span word="I">I</span> <span word="was">was</span> <span word="walking">walking</span> <span word="down">down</span> <span word="the">the</span> <span word="street">street</span> <span word="when">when</span> <span word="a">a</span> <span word="UFO">UFO</span> <span word="landed">landed</span>.</p><p> 否定句例句：<span word="I">I</span> <span word="wasnt">wasnt</span> <span word="walking">walking</span> <span word="down">down</span> <span word="the">the</span> <span word="street">street</span> <span word="when">when</span> <span word="a">a</span> <span word="UFO">UFO</span> <span word="landed">landed</span>.</p><p> 一般疑问句例句：<span word="Were">Were</span> <span word="you">you</span> <span word="walking">walking</span> <span word="down">down</span> <span word="the">the</span> <span word="street">street</span> <span word="when">when</span> <span word="a">a</span> <span word="UFO">UFO</span> <span word="landed">landed</span>?</p><p> 特殊疑问句例句：<span word="What">What</span> <span word="were">were</span> <span word="you">you</span> <span word="doing">doing</span> <span word="when">when</span> <span word="a">a</span> <span word="UFO">UFO</span> <span word="landed">landed</span>?</p>
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