英语因果连词.ppt

类别 1 1. for 义为：因为，由于…的缘故；既然；鉴于… Youd better put on your sweater, for its rather cold outside. 你最好把毛衣穿上，外边相当冷。 He felt no fear, for he was a brave man. 他不感到害怕，因为他是个勇敢的人。 Comfort him for he is sad. 去安慰他，因为他很悲伤。[比 because 较为正式，少用于口语中，用于提出证据或说明前面刚作的陈述] 判断改错：　 (错) For he is ill, he is absent today.　 (对) He is absent today, for he is ill.　 for是并列连词，不能置于含两个并列分句的句子的句首，只能将其放在两个分句中间。 比较since和for???　　Since 用来说明动作起始时间，for用来说明动作延续时间长度。　　I have lived here for more than twenty years.　　I have lived here since I was born..　　My aunt has worked in a clinic since 1949.　 　　Some new oilfields have been opened up since 1976.?　　I have known Xiao Li since she was a little girl.　?　　My brother has been in the Youth League for two years.　　　I have not heard from my uncle for a long time. 注意：并非有for 作为时间状语的句子都用现在完成时。　　 I worked here for more than twenty years.?　　　(我现在已不在这里工作。)　　 I have worked here for many years.　　　?　　　(现在我仍在这里工作。) 　　小窍门：　当现在完成时+一段时间，这一结构中，我们用下面的公式转化，很容易就能排除非延续动词在完成时中的误使。　　1)　(对) Tom has studied Russian for three years.　　　 = Tom began to study Russian three years ago, and is still studying it now.　　2)　(错) Harry has got married for six years.　　　 = Harry began to get married six years ago, and is still getting married now.　　显然，第二句不对，它应改为 Harry got married six years ago.　或 Harry has been married for six years. 2.because 1. 因为，由于： The boy was always late because it took so long to get dressed. 这个男孩因花太长时间穿衣服总是迟到。 I cant do it now because I am busy. 因为我正忙着，现在不能做此事。 2. [用于引导一个名词从句，相当于 that 或 the fact that]…这一事实，…这一点原因，原因是： The reason I am here is because I want to ask for your help. 我之所以到这儿来是想寻求你的帮助。 3. [用于省略句，表示暂不便说明详细理由]： I think it would make her feel better because. 我想它会使她觉得好受些。原因嘛，现在不说。 Because of But in over weight overweight people, it can look yellow because of fat. 但是在超重的人中，因为脂肪它可能看起来是黄色的。 Because of this, you sometimes can use contrails to predict the weather. 因为原理，你有时候可以用这条轨迹来预测天气。 There is something to this—but not because of what is happening in Am