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I needn't have bought milk.




                                                Future             ـــ D ـ   ا
                                                                 Necessity         ةرو ــــ  ا

                 It will be necessary           will have to + ر.ــ9

                                                You will have to study hard.
                                                It will be necessary to bring your car.
                                                You will have to bring your car.




                                                            lack of Necessity     ةرو ـــ  ا fـــ 1

                 It will not be necessary       won't have to + ر.ــ9

                                                You won't have to study hard.
                                                It will not be necessary to buy food tomorrow.
                                                You won't have to  buy food tomorrow.


                         Should - Ought to + inf    &    Shouldn’t - Ought not to + inf


                                                          It is advisable to
                                                          It is desirable to
                                                            I advise you to
                                                    If I were you, I would          +  ر.ـــــ96 ا
                                                It would be a good idea to
                                                       it is a good thing to
                                                           You had better
                              Should                    You would rather

                                      =

                                      .      عر
ـ   ا Pـ   xـM ا  ـ  , نأ  ـ  Sا 
ـ  Bـ,أ ل ـD, 
  ـE'    Should   م ـ+  :
                You should / ought to see that film if you get the chance.
                = It would be a good idea to see that film.
                                                      .      
ـ  xـC 
ـ' 
ـ أر PIـ , وأ $6ـI, 
  ـE'    Should   م ـ+  :
                A. Do you think we should / ought to ask before we borrow the car ?
                B. I think you should / ought to look for another job.
                                             . Bـ W ـ , 
  h  و tـ Hg  ـ r xـM ا نأ ل ـD, 
  ـE'    Sh ould   م ـ+  :
                Why are those students playing in the yard? They should / ought to be inside the
                classroom.
                                                          . BـAو ـ1  ـ  H  xـM ا نأ ل ـD, 
  ـE'       Should   م ـ+  :

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