,动 词,高中英语词汇系列,高中英语词汇系列,prevent,prevent,Learning Objectives,Learn the meanings and collocations of“prevent”;,Learn other forms of“prevent”;,Put what I have learned into practice.,1,2,3,After this lesson,I will be able to:,Meeting,“prevent”,Lead in,Whenever I feel sad,I will watch this video to prevent depression,.,1.Why do I like watching this video?,2.Are there any other expressions that can replace prevent?,3.What does prevent mean?,Whenever I feel sad,I will watch this video to prevent depression,.,4.It means“,keep something from happening,”.,prevent,prvent,v.,预防,Whenever I feel sad,I will watch this video to prevent depression.,Lets study,Do you want to know“prevent”better?,Meanings,1.Yet,even today,we still have fire buffs who seem to appear at every fire in an area.Sometimes they,prevent,firemen,from,doing their jobs.,1).Do firemen want fire buffs to appear on the spot?Why?,2).Are there any expressions that can replace“prevent.from.”here?,3).Can you explain the word in English?,It means,interpose or act as a hindrance,Meanings,2.Every possible means has been used to prevent the air pollution,but the sky is still not clear.,1).What are the possible means used for?,2).Are the means useful for stopping air pollution?,3).Can you explain the word in English?,It means,stop something from happening,Other forms,preventable,accidents/injuries,preventable,prevention,1.Whats the part of speech of“preventable”?,2.Can you guess the meanings of“preventable”?,As far as health is concerned,it is often said that,prevention,is better than cure.,1.Whats the part of speech of“prevention”?,2.Can you guess the meanings of“prevention”?,Practicing,Lets imitate.,May I prevent you from asking a favor?,Lets imitate.,Hes agreed to help us prevent this attack.,Lets imitate.,to prevent your house being sold from under your feet.,Letter Tiles,Please unscramble the tiles to reveal a phrase.,pr,ev,en,t.,.,fr,om,.,Memorizing,Make a word web of“prevent”.,forms,definitions(verb),collocations,synonyms,prevent,preventable,prevention,preventfrom,1.stop something from happening,2.interpose or act as a hindrance,stop,forbid,hinder,Frayer Model,Definition,s(in your own words)or synonyms,Charateristics,:(verb),1.regular or irregular:,2.transitive or intransitive:,3.other forms:,Examples,(verb),Collocations,prevent,Please finish this diagram based on the word web.,Recalling and using,Lets use the proper form of,prevent,to fill in the blanks.,1.Were looking at the benefits of systems which control their speed as a way of _(prevent)that.,（,2017,全国,）,2.It further requires that when opinions are from the opposite,the doctor doesnt overreact,which might prevent fellow doctors _ voicing opinions again.,（,2013,全国,),preventing,from,3.Your skin acts as a barrier against diseaser toxins,and the suns rays.It also helps control your body temperature,_(prevent)your body from losing too much water,warns you when things are too hot or cold,and gives you your sense of touch.(,新人教版高中英语选择性必修第二册,),prevents,Lets translate.,4.If you like,a squeeze of fresh lemon juice on the bananas will prevent them turning brown.(2018,全国卷,II),_,如果你喜欢，往香蕉上滴新鲜的柠檬汁可以防止香蕉变成褐色。,5.I could have asked her,but something _.,我本来是要问她的，但有些事阻止了我。（,2017,天津卷）,prevented me from doing so,Lets read.(Examples from Foreign Journals),1.This was done to,prevent,onlookers on boats and,prevent,the gases,from,affecting people,the president of the islands council,Mariano Hernndez,said.,BBC Sept.21,2021,2.Secret law,prevents,the public,from,understanding and shaping the law and thus inhibits democratic accountability;disables checks on governmental abuses of the law;and weakens the quality of the law itself.”,New York Times Sept.20,2021,Lets read and discuss.(Examples from Foreign Journals),As leaders of a team of health policy researchers that track policy responses to COVID-19,we know there is no perfect approach to,preventing,the virus.,Salon Sept.23,2021,How can we,prevent,ourselves being infected?Please list some measures,trying to use“prevent”as many as possible.,