PRESENT PERFECT

 What is it?

The present is a verb tense in english used to talk about action that occurred in the past but have a condition to the present it is formed using the verb 'to have' (have/has) followed by the past participe of the main verb.

AFIRMATIVE:

Have: I, we, they and you.                                                                                                                            Has: She, he and it.                                                                                                                                        S + Have/has + `Verb in the present + C 

NEGATIVE:

S + Have/has + not + Verb + C 

INTERROGATIVE CLOSED:

Have/has + S + Verb + C + ?

INTERROGATIVE OPEN:

Pronouns interrogative + Have/has + S + Verb + C + ?

EXAMPLE:

+ I have finished my homework.                                                                                                                  - I have not finished my homework                                                                                                              ? Have you finished your homework?                                                                                                          ? What have you finished?