Unit 4 Words and expressions 课件-2023-2024学年高中英语人教版（2019）选择性必修第一册

Unit 4 Words and Expressions vary v. (根据情况) 变化；改变 1. My doctor said I should vary my diet. 医生说我应该使日常饮食更加多样化。 2. The heights of these plants vary between 8cm and 20cm. 这些植物的高度从8厘米到20厘米不等。 3. The diamonds vary in size, so they have different prices. 钻石大小不同，所以价格也不同。 4. A variety of data have been collected from various sources. 种类繁多的数据是从各方面搜集来的。 5. Visiting an apple event is a good chance to see, and often taste, a wide variety of apples. 参观苹果节是一次能够看到而且通常是能够品尝多种多样苹果的好机会。 ① vary from...to... 由……到……不等 vary in... 在……(大小、形状等)上不同 vary with... 随……而变化 ② various adj.各种各样的；多姿多彩的 ③ variety n.种种；多样化 a variety of/varieties of 种种；各种各样的 ①Cherries vary colour from almost black to yellow. ②Whether it is in the past, at present, or in the future, time would not vary the development of the world. ③Over the past five years， he has been devoted to a (vary) of construction projects in Africa. ④The friendship between the people of the two countries has been strengthened through (vary) means. ⑤House prices and are usually high where there are famous schools. 各个地方房价不一，通常有名校的地方房价就高。。 单句语法填空/完成句子 in with variety various vary from place to place 随堂演练 appropriate adj. 合适的；恰当的 1. It is an appropriate time to make a speech. 这是发表演讲的合适时间。 2. His clothes were not appropriate for such a season. 他的衣服不适宜在这样的季节穿。 3. It was appropriate that she (should) keep silent at the time. 当时她保持沉默是合适的。 4. The old woman knew how to dress herself appropriately every day. 这个老太太知道如何每天得体地穿着。 ① be appropriate to/for 适合于 be appropriate (for sb. ) to do sth. (某人)做某事是合适的 It is/was appropriate that sb. (should) do. . . 某人做……是合适的。 ② appropriately adv. 适当地；恰当地 ①The book was written in a style appropriate the age of the children. ②It’s necessary for you to make your child know that you expect him to act