Do在英语中的用法ppt课件.pptx

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1、Do is an irregular verb. Its three forms are do, did, done. The present simple third person singular is does:l Will you dodo a job for me?l I diddid some shopping this morning.l Have you donedone your essay yet?l He usually doesdoes his homework in front of the television.Perform or take part in an

2、Perform or take part in an actionactionWe use do to talk about actions in general, when we do not specify exactly what the action is:l What have you been doingdoing today, anything interesting?l There is nothing we can dodo except wait and see what happens.l Can I dodo anything to help?Achieve, comp

3、lete or deal with somethingAchieve, complete or deal with somethingWe use do as a main verb to talk about achieving or completing things: A: Ive donedone the washing up. B: Oh, thank you.l We diddid 80 miles on the first day of our cycling holiday.l She doesdoes the crossword in the newspaper every

4、day.Work and other Work and other taskstasksWe use do with nouns such as homework, job, task, work:l She has a lot of homework to dodo tonight.l Im going to dodo some work in the garden this weekend.If you want to know what someones job or profession is, you can use the main verb do in a question: A

5、: What does Jackies brother dodo? B: Hes an electrician. Not: What does Jackies brother?Study a Study a subjectsubjectWe use do to talk about studying subjects: A: What diddid you do at university? B: I diddid economics. All children have to dodo English in primary school.Produce or Produce or creat

6、ecreateSpoken Spoken EnglishEnglish: : We often use do with nouns such as copy, design, drawing, painting, especially in informal speech:l I like that photo of you and me. Can you do do me a copy?l Who did did the design for the website?l She did did a lovely painting of the lake where we stayed las

7、t summer.Clean or make Clean or make tidytidyWe use do as a main verb to talk about cleaning things or making them tidy:l The cleaner was doing doing my room when I came back.l Ill just dodo my hair and then Ill be ready.Be enough or Be enough or acceptableacceptableWe use do as a main verb with wil

8、l or wont to talk about things being enough or acceptable: A: What size bag dodo you need? B: A small one will dodo. (a small one is enough/acceptable)Do is one of three auxiliary verbs in English: be, do, have. We use do to make negatives (do + not), to make question forms, and to make the verb mor

9、e emphatic.meaningmeaningexampleexamplenegativeI didnt see didnt see you at the concert the other night.question formDoDo they openopen at nine oclock on weekdays?emphaticHe does look does look smart in his new suit!Question (?) Question (?) formformTo make the question form of most main verbs, we u

10、se do, does (present simple) and did (past simple) followed by the subject and the main verb:l Do Do you play you play football?l Doesnt Doesnt he phone he phone you now and then?l Did Did your mother come your mother come from the same place as your father?Negative () Negative () formformThe negati

11、ve of the present simple and past simple of all main verbs (except for be and some uses of have as main verbs) is made with auxiliary do + not, which is shortened to dont (do not), doesnt (does not) and didnt (did not). We use the short forms in everyday informal language, and the full forms in more

12、 formal situations:l I dont want dont want to wait for a bus. Lets get a taxi.l Jack doesnt live doesnt live in the town centre. Hes out in the suburbs.l DidntDidnt you getget my email? I sent it at about four oclock.l The Prime Minister does not take does not take personal phone calls from members

13、of the public. (more formal)l DidDid the parents not not realiserealise that something serious had happened to their child? (more formal)Emphatic Emphatic formsformsWe use do, does (present simple) or did (past simple) to give extra force to the main verb. We use the infinitive of the main verb with

14、out to, and stress do/does/did when speaking.Compare:neutralneutralemphaticemphaticI likelike your new jacket.I do like do like your new jacket!She lookslooks so tired.She does look does look so tired!I didnt recognise your dad, but I recognisedrecognised your mumI didnt recognise your dad, but I di

15、d did recoginserecoginse your mumWe also use emphatic do with imperatives.l Do Do come come and have dinner with us some time.l Do Do stop talkingstop talking, Harry! Youre boring everybody!Question Question tagstagsWe use auxiliary do to form question tags for clauses which do not have a modal verb

16、, a verb in the perfect with have or clauses with be. The tag uses the same person and tense as the subject of the main verb. The tag may be affirmative or negative, depending on the type of tag:l You work work with Peter, dont you? , dont you? ( (affirmative main verb, negative tag) )l She plays pl

17、ays the piano, doesnt she?doesnt she?l Little children dont dont usually like like spicy food, do they? do they? ( (negative main verb, affirmative tag) )l They didnt didnt stay very long, did did they?l You live live near Harkness, do you? do you? ( (affirmative verb, affirmative tag) )l They arriv

18、ed late, did they?arrived late, did they?We dont use auxiliary do to make questions or negatives for clauses with modal verbs: Will Will you be you be here in time for lunch? Not: Do you will be here I I cant swim cant swim very well. Not: I dont can swimWe use auxiliary do, not auxiliary be, for qu

19、estions with main verbs in the present simple: Do Do you live you live in an apartment? Not: Are you live inWe use does, not do, for the third person in the present tense: DoesDoes your sister have brown eyes too? Not: Do your sister haveWe often use do instead of repeating all the words in a clause

20、. Do substitutes for the words we dont repeat: A: We went to the concert in the park this year. B: Yes, we diddid too. (Yes, we went to the concert in the park too.)We dont use do alone if the substitute verb is in the to-infinitive form. In those cases, we omit the verb but keep to, or we use do so

21、, do it or do that: Its not often I write letters to newspapers, but that day I desperately felt the need toto. or the need to to do so/it/thatdo so/it/that. (I desperately felt the need to write letters to newspapers.) Not: the need to do.Do so, do it, do Do so, do it, do thatthatWe sometimes add s

22、o, it or that after the substitute do. Do so, do it and do that are sometimes used differently, but they are often interchangeable: He said he was going to move to New Zealand and, to everyones surprise, he did did so/did it/did that.so/did it/did that.Do Do sosoWe use do so mostly to refer to actio

23、ns where the subject and verb are the same as the ones we have mentioned. Do so is generally more formal than do it and do that: I wanted them to leave, and politely asked them to do so, bto do so, but they wouldnt go, so I called the police. (I wanted them to leave and I politely asked them to leav

24、e.)WarningWarning: : Do Do so is more formal than do on its own:so is more formal than do on its own: A: Do you mind if I open the present now? B: Yes, please do sodo so. (Do so substitutes for open the present now)We often use do so when we make a general reference to a series of actions or events:

25、The birds make their nests on the north side of the island in little holes in the rocks. The reason why they do do so so is because the south side of the island is exposed to extreme winds.Do Do it itWe use do it when we refer to an action or an event involving a verb and an object, especially when

26、the subject is different from the one already mentioned: A: He accidentally deleted some emails on his computer. B: I do it do it all the time. (I delete files all the time.)Do Do thatthatDo that is more emphatic and we use it for deliberate actions: A: Would you ever give a complete stranger your p

27、hone number? B: No. I would never do thatdo that. (I would never give a complete stranger my phone number.)We often use do that in situations where we are contrasting things: A: Would you like to have a few nights in a motel? B: No, wed prefer not to do thatdo that. Wed rather have a nice hotel. (We

28、d prefer not to have a few nights in a motel.) A: Ive decided to wait a year before starting college. I want to travel a bit and see the world. B: I really think you should do that do that rather than starting college. Youre still so young. College will still be an option this time next year.(Contin

29、ued)Do thatDo thatWe can use a modal or an auxiliary verb + do to substitute for a main verb and what comes after it: A: I feel terrible. B: You should go to the doctor. A: I should doshould do, I know, but I have so much work to finish. A: Has Martin met Paul before? B: He could have done could have done at the sales meeting last year, but Im not sure.