Module 12 Unit2&3 知识点详解-广西桂林市雁山中学外研版八年级上册英语

外研版英语八（上）Module 12 Help知识点详解 Unit 2 What to do in an earthquake ★(A3).【知识点再现】Earthquakes always happen suddenly, so it is difficult to warn people about them. 地震总是发生得很突然，所以很难给予人们预警。 『知识点1』“It’s＋形容词＋(for/of sb.) to do sth.”意为“(对某人来说)做某事是……的”。如： It is kind of you to help me. 你能帮助我真的太好了。 It is important (for us) to learn English well. 对于我们来说，学好英语是重要的。 『知识点2』warn 是动词，意为“警告，告诫”，其用法如下： ①warn sb. about/of sth. 意为“警告某人注意/当心某事”。如： They warned him of the dangers of sailing alone. 他们警告他独自航行的重重危险。 They warned us about the tigers in the forest. 他们警告我们要注意森林中的老虎。 ②warn sb. (not) to do sth. 意为“警告某人(不)要做某事”。如： The police warn us not to go out at night. 警察告诫我们夜间不要出门。 He warned Peter to keep away from his daughter. 他警告彼得离他女儿远点。 ③warn sb. against doing sth. 意为“警告某人不要做某事”。如： He warned me against going there at night. 他警告我晚上不要到那去。 My teacher warned me against being late again. 老师警告我不要再迟到了。 ④warn sb.+that 从句。意为“警告某人……”。如： They warned her that she would lose her job. 他们警告她说她将丢掉工作。 The whistle warned visitors