PERFECT TENSE

      Definition : Used to express action that has been completed with

respect to the present

      Perfect tense can be used in 3 situation :

1)           To indicate something that has happen at an indefinite time in the past. Ex : I have that movie already

2)           To indicate something which started in the past and continuous until now. Ex : I have lived in New York for 9 years.

3)           To indicate something occurred recently. Ex : I have been sick lately.

      Formula :

A.         +}  S + HAVE/HAS + BEEN + COMP

- }  S + HAVE/HAS + NOT + BEEN + COMP

? }  HAVE/HAS + S + BEEN + COMP

Ex : +   Mike has been there

        -    Mike has not been there

        ?   Has mike been there ?

B.    +}  S + HAVE/HAS + VERB3 + OBJ/COMP

       - }  S + HAVE/HAS + NOT + VERB3 + OBJ/COMP

       ? }  HAVE/HAS + S + VERB3 + OBJ/COMP

Ex : +   Mira has collected data

        -    Mira has not collected data

       `?   Has Mira collected data

      Kind of Perfect tense :

1)     PAST PERFECT TENSE

A.         {+}  S + HAD + BEEN + COMP

B.          {+}  S + HAD + VERB3 + OBJ/COMP

2)     FUTURE PERFECT TENSE

A.         {+}  S + WILL/SHALL + HAVE + BEEN + COMP

B.          {+}  S + WILL/SHALL + HAVE + VERB3 + OBJ/COMP

Will : You, they, he, she, it

Shall : I, we