初中英语语法：状语从句的省略的问题
<p> 为了简洁起见，有的状语从句(如时间状语从句、条件状语从句、方式状语从句等)有时可省略从句的主语和部分谓语(尤其是当从句主语与主句主语一致，且从句谓语包括有动词<span word="be">be</span>时)：</p><p> <span word="She">She</span> <span word="fell">fell</span> <span word="asleep">asleep</span> <span word="while">while</span> (<span word="he">he</span> <span word="was">was</span>) <span word="doing">doing</span> <span word="his">his</span> <span word="homework">homework</span>. 他在做作业时睡着了。</p><p> <span word="While">While</span> (<span word="he">he</span> <span word="was">was</span>) <span word="doing">doing</span> <span word="so">so</span>, <span word="he">he</span> <span word="trembled">trembled</span> <span word="a">a</span> <span word="little">little</span>. 他这样做时稍稍颤抖了一下。</p><p> <span word="He">He</span> <span word="opened">opened</span> <span word="his">his</span> <span word="mouth">mouth</span> <span word="as">as</span> <span word="if">if</span> (<span word="he">he</span> <span word="was">was</span>) <span word="to">to</span> <span word="speak">speak</span>. 他张开口，好像要说话似的。</p><p> <span word="Often">Often</span> <span word="she">she</span> <span word="would">would</span> <span word="weep">weep</span> <span word="when">when</span> (<span word="she">she</span> <span word="was">was</span>) <span word="alone">alone</span>. 她一个人时，常常哭泣。</p><p> <span word="Id">Id</span> <span word="like">like</span> <span word="to">to</span> <span word="see">see</span> <span word="you">you</span> <span word="whenever">whenever</span> (<span word="its">its</span>) <span word="convenient">convenient</span>. 在你方便的时候我想来看看你。</p><p> <span word="If">If</span> (<span word="you">you</span> <span word="are">are</span>) <span word="traveling">traveling</span> <span word="north">north</span>，<span word="you">you</span> <span word="must">must</span> <span word="change">change</span> <span word="at">at</span> <span word="Leeds">Leeds</span>. 如果你是向北行，你必须在里兹换车。</p><p> 【注】有些由<span word="if">if</span>构成的省略结构，已属固定短语，如<span word="if">if</span> <span word="any">any</span>, <span word="if">if</span> <span word="necessary">necessary</span>, <span word="if">if</span> <span word="possible">possible</span>, <span word="if">if</span> <span word="not">not</span>, <span word="if">if</span> <span word="so">so</span>：</p><p> <span word="There">There</span> <span word="are">are</span> <span word="few">few</span>, <span word="if">if</span> <span word="any">any</span>, <span word="mistakes">mistakes</span> <span word="in">in</span> <span word="that">that</span> <span word="book">book</span>. 那本书就是有错误也不多。</p><p> <span word="If">If</span> <span word="necessary">necessary</span>, <span word="ring">ring</span> <span word="me">me</span> <span word="at">at</span> <span word="home">home</span>. 如果必要，可以打电话到我家找我。</p><p> <span word="If">If</span> <span word="possible">possible</span>, <span word="I">I</span> <span word="wish">wish</span> <span word="to">to</span> <span word="go">go</span> <span word="there">there</span> <span word="next">next</span> <span word="summer">summer</span>. 如果可能，我希望明年夏天去。</p><p> <span word="He">He</span> <span word="may">may</span> <span word="be">be</span> <span word="busy">busy</span>. <span word="If">If</span> <span word="so">so</span>, <span word="Ill">Ill</span> <span word="call">call</span> <span word="later">later</span>. <span word="If">If</span> <span word="not">not</span>, <span word="can">can</span> <span word="I">I</span> <span word="see">see</span> <span word="him">him</span> <span word="now">now</span>? 他可能很忙，要是这样，我以后再来拜访。要是不忙，我现在可以见他吗?</p>
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