2022新人教版（2019）《高中英语》选择性必修第一册Unit 5 核心词汇突破(ppt课件).pptx

1、UNIT 5 WORKING THE LAND 核心词汇突破核心词汇突破核心词汇突破核心词汇突破1.devote vt.把献(给);把专用于;专心于单句填空Society even praises“burning the candle at both ends”as a sign of our(devote)to work and family.If you are a student,do devote yourself to(digest)your teachers instruction until you fully understand it.The couples son,whom

2、 they are so devoted,went abroad for further education,leaving them alone in the small town.devotiondigestingto【归纳】(1)devote.to.把奉献于(2)devoted adj.忠实的;深爱的be devoted to(doing)sth专心于(做)某事;奉献于(做)某事(3)devotion n.关爱;关照;奉献;忠诚devote.to.中的to是介词,其后常接名词、代词或动名词作宾语。2.convince vt.使相信;使确信;说服单句填空We have been tryin

3、g to convince him(tackle)the problem in this way in the past few days.Im not completely(convince)that he has the determination to overcome the difficulty.His speech was so (convince)that everyone present entirely believed what he said.to tackleconvincedconvincing【归纳】(1)convince sb to do sth说服某人做某事co

4、nvince sb of sth使某人相信某事(2)convinced adj.确信的;深信的be convinced of sth/that.确信(某事)make sb convinced of sth使某人相信某事(3)convincing adj.令人信服的;有说服力的3.assumption n.假定,假设;(责任的)承担;(权利的)获得单句填空We are working the assumption that everyone has the ability to tackle difficult problems.They assumed her(be)the best sing

5、er of their time.onto be【归纳】(1)on the assumption that.假定make an assumption作出臆断(2)assume v.假定;设想;承担;假装assume sb/sth(to be)+adj./n.假定/认为某人/某事(为)It is generally assumed that.人们普遍认为assuming(that).假设4.expand vt.&vi.扩大;增加vt.扩展;发展(业务)单句填空When you heat a metal,it(expand).I dont quite understand your explana

6、tion.Can you expand _it?expandson/upon【归纳】expand into发展成;扩展到expand on/upon详细阐述;详述expand ones knowledge/horizons 拓展知识/开阔视野5.estimate vt.估计;估价;估算n.估计;估算单句填空They estimate the cost of the trip$3,000.The tree is estimated(be)at least 700 years old.People estimate 80%of all conversation in English is smal

7、l talk.atto bethat【归纳】estimate sth at估算be estimated to be/have/cost估计是/有/花费estimate that估计It is estimated that.据估计6.alternative n.可供选择的事物adj.可供替代的;非传统的单句填空It was so serious a matter that I had no alternative but(call)the police.The Internet also provides us with a cheap alternative to _(communicate)

8、with others.I could come to your house,or (alternative),we could meet in town.词汇升级Faced with such a dilemma,we have no choice but to stay at home.to callcommunicatingalternativelyalternative【归纳】(1)have no alternative but to do sth别无选择只好做某事an alternative to 的替代品(2)alternatively adv.可供选择地“别无选择只好做”的其他表

9、达形式:have no choice but to do sthcant do sth but do sth7.in turn相应地;转而;轮流;依次单句填空Now that we have finished the design,it is their turn to construct.I think its my turn(drive)the kids to school this week.Theory is based on practice and turn serves practice.into drivein【归纳】(1)in ones turn轮到某人;接着by turns

10、轮流;交替地it is ones turn to do sth轮到某人做某事(2)take turns to do sth轮流做某事重点句型重点句型given that.引导条件状语从句【教材原句】Given that Yuans hybrids have made him quite wealthy,one might think he would retire to a life of leisure.(P51)考虑到杂交水稻使袁隆平变得相当富有,人们可能认为他会退休享受闲适的生活。完成句子 (考虑到她对儿童感兴趣),Im sure teaching is the right career for her.(假如下雨),can we play the match indoors?Given that/Considering she is interested in childrenSupposing(that)it rains【归纳】(1)given that.=considering.只要,考虑到,引导条件状语从句(2)supposing(that)假设;如果assuming(that)假使as long as只要