Present perfect tense когда ставится Have а когда Has

Present Perfect (Positive)

I/You/We/They + have + verb3/or ed + остальные слова

He/She/It + has + verb3/or ed + остальные слова

For example:

I have done my homework.

She has broken her arm.

He has lost his keys.

I have cut my finger.

The car has broken.

Present Perfect (Negative)

I/You/We/They + have not (haven't) + verb3/or ed + остальные слова

He/She/It + has not (hasn't) + verb3/or ed + остальные слова

For example:

I haven't cut my finger.

The car hasn't broken.

Present Perfect (Questions)

Have + I/You/We/They + verb3/or ed + остальные слова

Has + He/She/It + verb3/or ed + остальные слова

For example:

Have I done my homework?

Has she broken her leg?

Надеюсь, объяснила доступно; )))