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    Learn English > English lessons and exercises > English test #121088: Lack of obligation
    > Other English exercises on the same topics: Frequent mistakes | Modals [Change theme]
    > Similar tests: - Placement test beginners: Check your spelling - Past simple or present perfect - Although / in spite of / despite - Differences between Like and As - Again/ back - FOR and its use - Do or Make? - Do-don't-does-doesn't
    > Double-click on words you don't understand

    Lack of obligation

    When we want to express a lack of obligation (which normally needs a modal auxiliary), European students immediately think of a copy of their own structures: "It isn't necessary..." and almost immediately add "that" : "it isn't necessary that..."  ... No harm done yet... If they go on copying their own language, they then make a HUUUUUUUge mistake! Therefore, it's better to learn how

    to express that absence or lack of obligation in English, especially as it's quite easy!      

     1)   IT ISN'T NECESSARY... : This form,  that French people do love really exists.  BUT it must be followed by a complete infinitive proposition (or a 'subjunctive' ... but that's another story !)

    -  It's not necessary FOR you TO change the bed sheets for me.

     Here is, therefore, one of the ways to express an 'absence of obligation' ... but it's not, by far, the only one which is used ...



    2) NEEDN'T: NEED: Here, this semi-modal behaves like a real modal auxiliary:  that is to say that the negative form is made simply by adding NOT to the 'verb', and doesn't need an auxiliary. It's very often found in the negative form and sometimes in the interrogative one.

     - Your dad needn't repair his car himself; he can take it to the mechanics... 

    In the interrogative form, the speaker asks his co-speaker to give his opinion on the necessity or lack of obligation to do the action.

    - Need I  answer this question? means : 'In your opinion: Need I answer, or not ?'




    3) DON'T NEED TO : Here, the semi-modal auxiliary is considered like a normal verb, that is to say it needs the auxiliariesDO/ DOES/ DID/ WILL/ WON'T/ WOULD/ WOULDN'T etc. in the interrogative and negative forms.

     - You don't need to answer that question, really ...

    The difference between 'you needn't go ' and 'you don't need to go' is very small... Between the two, there's a slight nuance of points of view : 'needn't' expresses a judgement, an opinion from the speaker, whereas 'don't need to' sticks to facts and their observation.

    Like for all 'ordinary' verbs, this form is used in all different tenses ('you didn't need to ...' ; he won't need to ... ; they wouldn't need to ...).


    4) DON'T HAVE TO: Contrary to 'must', 'have to' expresses an absolute, objective necessity, which isn't required by the speaker. In the negative form,  (like 'don't need to') it will express , the mere observation of  facts, a lack of objective necessity.


     - You didn't have to pay for your ticket: I had an invitation for you! 




    You can take the test now. It is easy !  


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    English exercise "Lack of obligation" created by here4u with The test builder. [More lessons & exercises from here4u]
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    1. ' Oh no, Mum! You so early… I can get ready alone and be on time…'

    2. 'Of course not! You a passport to go from one state to another one… There was no border to cross…'

    3. You a white shirt, but you’ll a tie for your job interview tomorrow.

    4. 'Don’t worry! You tidy up your desk to find your precious document. I had it in my drawer...'

    5. 'You all that way… I could have gone there to meet your parents.'

    6. 'I the bus in order to get to my appointment in time; my parents will drive me there.'

    7. 'Our clothes everyday, and they ironed today.'

    8. 'You all that food… There was plenty of it here already.'



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