In fact,Hollywood wouldn't be what it is if it wasn't for a small troop of actors that ventured into it in the1910s. 实际上，如果不是因为在二十世纪头十年里到这里冒险的那一小群演员们.，好莱坞也许就 不是现在的样子了。 本句中使用了虚拟语气，表达与现在事实相反的情况。其中”引导的条件状语 从句中用的是动词的过去式，主句中用的是woud+动词原形的形式。 注意：在一般情况下，虚拟语气中be动词的过去式为were”,但经常会用"was”来替 代虚拟式的"were"。有时"was”出现的可能性会大于were"。 IfI were (was)you,Iwouldn'tgowith him 如果我是你，我不会跟他去。 If it wasn'tfor my mother,I wouldn't be a teacher now 如果不是因为我母亲，我现在不会当老师。 Beginning in 1908,a growingnumber of filmmakers located in southern California,drawn by cheap land and labor,the ready accessibility of varied scenery,and a climate ideal for year-round outdoor filming. 从1908年开始，越来越多的电影工作者来到加利福尼亚州的南部，这里吸引他们的是廉 价的土地和劳动力、现成的多变的场景及适合全年户外拍摄的理想气候。 本句分别用到了现在分词短语和过去分词短语来作状语。beginning in1908”作时 间状语，而"drawn by”作的是原因状语。 注意：分词在句中作状语时，它的逻辑主语应该和句子的主语一致 He left the houseshutting the door behind him. 他离开了家，随手关上了门。 Frightened by the big fire,the baby girl started crying loudly. 因为受到大火的惊吓，小女孩开始大哭起来。 This is how the American movie industry was born. 这就是美国电影工业如何产生的 句中how”引导的是表语从句。 That is wherel first met my girlfriend.In fact, Hollywood wouldn't be what it is if it wasn't for a small troop of actors that ventured into it in the 1910s. 实际上，如果不是因为在二十世纪头十年里到这里冒险的那一小群演员们，好莱坞也许就 不是现在的样子了。 本句中使用了虚拟语气，表达与现在事实相反的情况。其中“if”引导的条件状语 从句中用的是动词的过去式，主句中用的是“would+动词原形”的形式。 注意：在一般情况下，虚拟语气中 be 动词的过去式为“were”，但经常会用“was”来替 代虚拟式的“were”。有时“was”出现的可能性会大于“were”。 If I were（was）you, I wouldn't go with him. 如果我是你，我不会跟他去。 If it wasn't for my mother, I wouldn't be a teacher now. 如果不是因为我母亲，我现在不会当老师。 Beginning in 1908, a growing number of filmmakers located in southern California, drawn by cheap land and labor, the ready accessibility of varied scenery, and a climate ideal for year-round outdoor filming. 从 1908 年开始，越来越多的电影工作者来到加利福尼亚州的南部，这里吸引他们的是廉 价的土地和劳动力、现成的多变的场景及适合全年户外拍摄的理想气候。 本句分别用到了现在分词短语和过去分词短语来作状语。“beginning in 1908”作时 间状语，而“drawn by ...”作的是原因状语。 注意：分词在句中作状语时，它的逻辑主语应该和句子的主语一致。 He left the house shutting the door behind him. 他离开了家，随手关上了门。 Frightened by the big fire, the baby girl started crying loudly. 因为受到大火的惊吓，小女孩开始大哭起来。 This is how the American movie industry was born. 这就是美国电影工业如何产生的。 句中“how”引导的是表语从句。 That is where I first met my girlfriend