[b]动词不定式的用法[/b][b][b](1)[/b]表示第一人[b]the first woman to do sth.[b][b][b][b](2)[/b]表示迫使的动词[b]一般考三个， allow/ enable/ call, +sb. + to do[b][b][b](3)[/b]表示倾向[b]…[/b]的形容词[b]be more likely to do 更有可能作某事[b]be inclined to do倾向于做某事[b]be lieable to do 易于…的[b]be apt to do[b][b][b](4)[/b]表示目的的名词，[b]一共有[b]7[/b]个这样的词，这一条也是最重要的。[b]固定的句式：[b]the purpose , the purpose of sth is to do sth.[b]the objective 目标[b]aim[b]goal[b]reason理由[b]function功能[b]intension意图[b]例：The function of Louis Sullivan's architecture was providing [/i]large uninterrupted floor areas and to allow ample light into the interior.[b]分析：斜体部分错，正确的为the function to provide [b]例：The chief goal of biochemistry is for understanding[/i] the structure and behavior of the carbon-containing compounds that make up various components of a living cell. [b]分析：斜体部分错，正确的为the chief goal is to understand [b][b][b](5)[/b] be to do 表示已安排好或者注定要发生的动作，属于将来时态的范畴[b]She and Anne are to meet at two o'clock.[b][b][b](6)[/b]不定式的完成式为“to have done”，表示不定式的动作在谓语动作之前发生，这个完成式通常表示一般过去时[b]I am glad to see you.[b]I am glad to have seen your mother yesterday.[b]yesterday是一般过去时，修饰have seen.[b][b][b](7)[/b] 形容词后面使用动词不定式，主动表示被动[b]It is difficult to decide.[b][b]附：一些动词后面必须用[b]doing[b][/b]对于加doing的词来说，考试中一般出现一个，下面这些词都是要加doing的，请考生牢记。[b]mind, finish, enjoy, celebrate, advocate, suggest, delay, quit, forgive(原谅)，tolerate，avoid, escape(逃避)，spend+名词+doing;[b]have trouble/difficult/a problem/ +doing