情态动词知识点和练习modalverbs.ppt

Modal Verbs,What did Betty say to make the guest very angry?,Modal Verbs I,had better,should,ought to,must,have to,Terrible Hobbies,1.You had better eat more vegetable and fruits.2.You had better drink less wine.3.You had better not surf the Internet.4.You had better get up and go to bed early.5.You had better take more exercise.,The Doctors Advice,had better,1.The positive form(肯定形式)of had better is _.2.The negative form(否定形式)of had better is _.,had better,had better not do Sth.,had better do Sth.,Had better is used when you give advice about something to somebody,but the person who you give advice may not accept it.,Structure,Meaning,Some advice on Western table manners,1.You should keep the knife in your right hand and the fork in your left.You ought to keep the knife in your right hand and the fork in your left.2.You shouldnt ask a second bowl of soup.You ought not to ask a second bowl of soup.3.You shouldnt drink too much.You ought not to drink too much.4.You should finish everything on your plate.You ought to finish everything on your plate.,should,Western Table Manners,ought to,Should&Ought to,1.The positive forms of should and ought to are _ and _.2.The negative forms of should and ought to are _ and _.,should not do Sth.,ought not to do Sth.,should do Sth.,ought to do Sth.,Structure,Meaning,Should or ought to is used when you have your duty to do something.,A lot of housework,clean the house,washall theclothes,walk the dog,water the flowers,1.You must clean the house.I have to clean the house.2.You must water the flowers.I have to water the flowers.3.You must wash all the clothes.I have to wash all the clothes.4.You must walk my dog after dinner.I have to walk her stupid dog after dinner.,musthave to,Housework,Must&Have to,Must is used when you want to say that it is necessary for someone to do something.Have to is used when you are forced to do something by the situation or a rule.,Meaning,1.Get to school on time.2.Wear school uniforms everyday.4.Dont wear any jewelry(首饰)at school.5.Dont take cellphones to school.6.Turn off the light before leaving the classroom.7.Don t ride your bike at the campus.,List middle school rules,Modal Verbs-had better,should,ought to,1.对某人该做某事提出自己的观点 一般用 You had better+v.原形 否定用 You had better not+v.原形,Eg.Youd better make yourself known to the world.Youd better not eat fruit that isnt ripe.,2.尽力说服某人应该做某事 一般用 You should+v.原形 否定 You should not+v.原形 或者用 You ought to+v.原形 否定You ought not to+v.原形,Eg.You should/ought to be careful with your writing.You should not/ought not to eat too much junk food.,1.The doctor is giving advice.Complete the following sentences,using should,ought to,had better or their negative forms否定形式 to give advice.,Example:You have got a bad cold.You had better take some medicine.,You have a bit of a fever.You_You_ if you want to be healthy.If you are sick,you _Before you eat an apple,you _.You dont look well.You _.You have a bad cough.You_ _.7)This medicine will make you sleepy.You_ _.There is nothing seriously wrong with your knee,but you_ _.,should stay home today,had better change your diet,had better not go outside in the rain,should make sure it is ripe,ought to get some rest.,had better take this cough medicine twice a day,had better not drive your car until this afternoon,should try not to run on it,