一般现在时代替完成时
<p>1) 有些动词用一般现在时代替完成时：</p><p><span word="hear">hear</span>, <span word="tell">tell</span>, <span word="learn">learn</span>, <span word="write">write</span> , <span word="understand">understand</span>, <span word="forget">forget</span>, <span word="know">know</span>, <span word="find">find</span> , <span word="say">say</span>, <span word="remember">remember</span>.</p><p> <span word="I">I</span> <span word="hear">hear</span> (= <span word="have">have</span> <span word="heard">heard</span>) <span word="he">he</span> <span word="will">will</span> <span word="go">go</span> <span word="to">to</span> <span word="London">London</span>.</p><p> <span word="I">I</span> <span word="forget">forget</span> (=<span word="have">have</span> <span word="forgotten">forgotten</span>) <span word="how">how</span> <span word="old">old</span> <span word="he">he</span> <span word="is">is</span>.</p><p>2) 句型<span word="It">It</span> <span word="is">is</span> … <span word="since">since</span>…代替<span word="It">It</span> <span word="has">has</span> <span word="been">been</span> … <span word="since">since</span> …</p><p>3) <span word="It">It</span> <span word="is">is</span> (= <span word="has">has</span> <span word="been">been</span>) <span word="five">five</span> <span word="years">years</span> <span word="since">since</span> <span word="we">we</span> <span word="last">last</span> <span word="met">met</span>.</p>
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