Unit 4 必背单词短语句型基础知识过关学案 2022-2023学年高中英语人教版（2019）必修第三册

Unit 4重点词形转换： 1. recycle vt. 回收利用；再利用→recycler n. 回收站；反复循环器 2. lack n. 缺乏；短缺　vt. 没有；缺乏→lacking adj. 缺乏的；不足的 3. float vi. 浮动；漂流；漂浮　vt.使浮动；使漂流→floating adj. 流动的；浮动的 4. keen adj. 热衷的；渴望的→keenly adv. 敏锐地→keenness n. 渴望 5. current adj. 当前的；现在的　n. 水流；电流；思潮→currently adv. 现时；目前 6. sufficiency n. 足量；充足→sufficient adj. 足够的；充足的→sufficiently adv. 足以；充分地 7. soap n. 肥皂→soapy adj. 满是肥皂的 8.regular adj 有规律的→regularly adv.规律地 9.determine v.决定----- determined adj. 下决心的----- determination n. 决定 10.depend v. 依靠，依赖----dependent adj 依赖的 Unit4重点单词短语： 1.determined adj.有决心的;意志坚定的 However,some scientists were determined to help humans realise their dream to explore space. 然而,一些科学家决意要帮助人类实现探索太空的梦想。 知识延伸 (1)determine v.查明;确定;决定 determine to do...决定做……(表示动作) determine on/upon(doing)sth决定(做)某事 (2)be determined to do决心做…… (3)determination n.决心;坚定;果断 with determination坚决地;果断地 知识运用 (1)She determined 　　　　　(work) twice as hard as before to make up for the lost time.  (2)I have determined 　　　　　working as a volunteer teacher in the countryside after graduation.  (3)Everyone concerned acted with great courage and 　　　　　(determine).  (4)As he was determined never to come back before he could make big fortune,Mike left home without saying a word. →　　　　　 never to come back before he could make big fortune,Mike left home without saying a word.  2.disappointed adj. 失望的;沮丧的;失意的 These disasters made everyone sad and disappointed,but the desire to explore the universe never died. 这些灾难使每个人都感到悲伤和失望,但探索宇宙的欲望从未泯灭。 知识延伸 (1)be disappointed (2)disappoint vt.使失望;使沮丧;使(希望、计划等) 落空;挫败 disappointing adj.令人失望的;扫兴的(形容事) disappointment n.失望;挫折 to one’s disappointment令某人失望的是 知识运用 (1)Do not be 　　　　　(disappoint) if you have to try several times before you finally stop smoking.  (2)Our results in this market have been rather　　　(disappoint) compared with last year.  (3)Only a few people were in support of his plan,which made him very　　 (disappoint).  (4)For many,their long-awaited homecoming was a bitter 　　　　　(disappoint).