Unit 2 Healthy Lifestyle Grammar 语法讲解-高中英语人教版（2019）选择性必修第三册.pptx

DISCOVER USEFUL STRUCTURESGRAMMAR1.To change bad habits is never easy.2.It took extra time to do the job properly.3.To join the Peoples Liberation Army,it is required for men to shave off their beards.4.It was not polite to disturb your neighbors with loud music last night.Activity 11 1 动词不定式作主语 （1 1）用作主语的不定式及短语常出现在谓语动词之后，而句首用形式主语it 代替。It is not right for people with the virus to go to public places.（2 2）单个不定式作主语，谓语动词用单数形式。To get To get enough protein each day is is beneficial to our health.To get To get good grades requires requires a lot of hard work.动词不定式动词不定式（3）常用句型：It is+adj.+for/of sb.+to do sth.形容词表示事物或行为的特点或性质，介词用for，如 difficult,possible，necessary.形容词表示人的品格或特点，介词用of，如 kind，polite，impolite，rude，foolish.It is necessary for us to prevent the war breaking out.It is too impolite of you to speak to an outstanding teacher like this.It+be+名词+to do sth.做某事是 Its my duty to take good care of my younger sister.It takes sb.some time to do sth.做某事花费某人多长时间 It took me more than an hour to do my homework yesterday evening.单句语法填空单句语法填空（1）Sometimes its better （remain）silent.（2）Although is a hard task to protect our environment，we cant help but go ahead.（3）（control）the air pollution is necessary.（4）It was foolish him to endanger his life in that way.（5）Dont you think it is rude him to ask a lady her age?（6）It is difficult him to live on such a small salary.to remain it To control/Controlling of of for 2 疑问词+不定式（1）可用于该结构的疑问词疑问代词：疑问代词：who，whom，what，which 疑问副词：疑问副词：when，where，how（2）常接该结构的动词：know，see，decide，tell，ask，consider，explain，learn，wonder（3）该结构的句法功能：主语、宾语和表语How to construct the theoretical framework is very important.I know where to find that patriotic young man.The question is when to start developing such a vaccine.单句语法填空单句语法填空（1）I couldnt decide bike to buy.（3）When and where （vote）hasnt been decided.完成句子完成句子（3）They didnt decide （在哪里举行）the debate.which to vote where to hold 3 不定式短语作独立成分（1）通常位于句首，有时位于句中或句末，要用逗号同其他句子成分隔开。To tell the truth，I dont like the gifted actress in the movie.（2）常用短语 to sum up 总而言之 to be brief 简言之 to tell the truth 说实话 to be exact 确切地说 to conclude 总而言之，最后to be frank 坦白地说 to begin/start with 首先to be honest 说老实话 To be frank，your theory is too abstract for the students to understand.完成句子完成句子（1）（总而言之），most of the committee members supported the idea but a few were against it.（2）（简言之），he was happy with the result.（3）She wrote，（确切地说），ten novels in her lifetime.（4）（首先），hes too young for that kind of job.（5）（说老实话），I dont really want to go to the party tonight.To sum up/To conclude To be brief to be exact To begin/start with To be honest It is important to avoid passive cigarette smoking.important/avoid/passive cigarette smokinguseful/turn to/fitness consultant/for advice It will take an hour for a nutrition specialist to make a balanced diet menu for you.will take/nutrition specialist/a balanced diet menu/make/an hour/for you.It is useful to turn to a fitness consultant for advice.illegal/dangerous/take/drugsIt is dangerous to take illegal drugs.harmful/skip breakfast/often It is harmful to skip breakfast（too）often.Activity 2Complete the conversations with the correct forms of the phrases in the box.1.A:Hello,doctor.I want to lose weight,but I just can t seem to do it.What can you do to help me?B:Well，first,its necessary to _what you eat.Cut out all fatty food and sugary drinks,and eat more fruit and vegetables.2.A:I really need to _ a way to exercise more.I could use a fitness app,but my phones full.B：So delete a few files.Im sure the app doesnt take up much space.3.A:Before exercising,always do a few warm-ups to _.B:I know.But then I always feel too tired to continue!4.A:ShouId I go for the pizza or the fried chicken?I hate _like these.You know whatlm going to eat both!B:Wow!Dont eat too much junk foodyoull get fat.Ive actually _ to go on a diet,so Ill just stick to the fruit salad.be in control of begin with be in control of make a choice decide on make up ones mind decide onbegin withmaking a choicemade up my mindActivity 3