Present perfect simple & present perfect continius

P P Simple

It's use for:

• To speak of an action that began in the past and still continuous



• To speak of a very recent past action and for which any reference of time does not occur



• To speak about a past action whose results are reflected in the present

It's form:

• AFIRMATIVE:
  forms with the present of the verb; to have' and the past of the verb that is conjugated [I have played tennis]


• NEGATIVE:
  In the negative form ' is placed; not' after verb ' to have' [He has not played ]


• INTERROGATIVE:
  the interrogatory form forms later putting the first aid and the subject [ have you played ]

p p continius

It's use for:

• It is used when it is wanted to express the sense of the continuity of an action that has begun in the past, which it still lasts in the present and that even can continue in the future.

It's form:

• AFIRMATIVE:
  subject + present perfect of ' to be' + gerund [I have been playing]


• NEGATIVE:
  In the negative form ' is placed; not' after the aid [ I have not been playing ]


• INTERROGATIVE:
  The interrogatory form, forms investing to the position of the subject and the aid [Have I been playing? ]

credits:

http://www.englishpage.com/

www.better-english.com/

www.inglesmadrid.com/

www.geocities.com/