［动词不定式］ It#039;s for sb.和 It#039;s of sb
<p> 这样的句子中，由于表语形容词性质的不同，导致了不定式逻辑主语标志用<span word="for">for</span>或<span word="of">of</span>的区别。</p><p> 1）<span word="for">for</span> <span word="sb">sb</span>. 句型中的形容词一般为表示事物的特征特点，表示客观形式的形容词，如<span word="easy">easy</span>， <span word="hard">hard</span>， <span word="difficult">difficult</span>， <span word="interesting">interesting</span>， <span word="impossible">impossible</span>等：例如：</p><p> <span word="Its">Its</span> <span word="very">very</span> <span word="hard">hard</span> <span word="for">for</span> <span word="him">him</span> <span word="to">to</span> <span word="study">study</span> <span word="two">two</span> <span word="languages">languages</span>. 对他来说学两门外语是很难的。</p><p> 2）<span word="of">of</span> <span word="sb">sb</span>句型中的形容词一般为表示性格，品德，心智能力，表示主观感情或态度的形容词，如<span word="good">good</span>， <span word="kind">kind</span>， <span word="nice">nice</span>， <span word="clever">clever</span>， <span word="foolish">foolish</span>， <span word="right">right</span>.例如：</p><p> <span word="Its">Its</span> <span word="very">very</span> <span word="nice">nice</span> <span word="of">of</span> <span word="you">you</span> <span word="to">to</span> <span word="help">help</span> <span word="me">me</span>. 你来帮助我，你真是太好了。</p><p> 用<span word="for">for</span>还是用<span word="of">of</span> 的另一种辨别方法：</p><p> 用介词<span word="for">for</span>或<span word="of">of</span>后面的逻辑主语作句子的主语，用介词前边的形容词作表语，造个句子。如果通顺用<span word="of">of</span>，不通则用<span word="for">for</span>.例如：</p><p> <span word="You">You</span> <span word="are">are</span> <span word="nice">nice</span>. （通顺，所以应用<span word="of">of</span>）。</p><p> <span word="He">He</span> <span word="is">is</span> <span word="hard">hard</span>. （非所表达的意思，不通，因此用<span word="for">for</span>.）</p><p> </p>
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