文档介绍：Module 4 The natural elements 一. 本周教学内容: Module 4 The natural elements Unit 1 Electricity today [教学过程] 重点词汇 appliance efficiently electrical flash fright neater lightening link mainly microwave operate plug pylon refrigerator steam storm vacuum wire be known as... be known as 作为……而出名 He is known asa fair judge. 他作为一名公正的法官而出名。同义词: be famous as 辨析: be known for 意思是“因……而出名”, 相当于 be famous for 。 He was known for his frankness. 他因坦诚而出名。 be known to 意思是“……所熟知的”。 As is known to all, the earth is round. 正如大家所熟知的那样,地球是圆的。 yet 用法在现在完成时的句子中, already 常用于肯定句, yet 常用于否定句和疑问句,但 yet 还有其他用法。 1. 用于否定句中,意思是“还、尚、迄今、到那时”。例如: He is not yet here. 他还未到。 At three o’ clock they had not yet decided whether to play basketball or not. 三点钟时他们尚未决定是否去打篮球。 2. 用于疑问句中,意思是“已经”。例如: Is everything ready yet ? 一切都准备好了吗? 3. 与比较级连用,意思是“更”。例如: You must work yet harder. 你还需更努力地工作。 once , again , another 连用,意思是“再”。例如: He has made yet another mistake. 他又犯了一个错误。 5. 用于肯定句中,意思是“仍然、还得”。例如: She is yet a child. 她还是个孩子。 6. 用作并列连词时,意思是“然而、可是”。例如: He studied hard yet he failed. 他学习努力,可是考试仍未及格 still : yet 辨析 1a. 一般说来,这两个副词几乎可以通用,只是两者在句中的词序稍有不同比较: I’ ve still a few more pages to read. 我尚有几页书要读。 I’ vea few more pages to read yet. 我尚有几页书要读。 We have exported a lot of goods , but we must export still more. 我们已出口了许多货物,但仍须再多出口一些。 We have exported a lot of goods , but we must export more yet. 我们已出口了许多货物,但仍须再多出口一些。 1b. 两者的情态色彩和语气强弱不一样。试举