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UNIT 5: VERY IMPORTANT MEMBER


                  THEORY

                  MODALS

                  “Modals” are the “small” verbs like CAN, MUST and MIGHT, which give certain meaning to
                  main verbs.

                  FORM


                  There are twelve modal verbs:

                  Can, shall, must, could, should, ought to, may, will, need (to), might, would, dare

                  Positive is formed by putting the modal between the subject and the main verb:

                  We should stay

                  Negative is formed by adding NOT or N´T after the modal:

                  We shouldn´t stay


                  Questions are formed by changing the position of the modal and the subject:

                  Should we stay?

                  Negative questions generally use N´T. if NOT is used, there is a different order:

                  Should we not stay?

                  CAN, COULD

                  CAN means:


                      a)  Know how to, be able to: I can swim
                      b)  Be allowed to: you can sit there

                  COULD is the past of CAN

                  I couldn´t go to work this morning

                  CAN and COULD are used in request. COULD is more polite:

                  Can I have a glass of water, please?


                  Could you open the window for me, please?

                  CAN, COULD, BE ABLE TO

                  BE ABLE TO is used instead of CAN in the future, and sometimes also in the present and the
                  past:
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