to have
Present perfect I have walked,
he has walked, they have walked.
I have swum, he has swum, they have swum. Past perfect I had walked, he had walked, they had walked. I had swum, he had swum, they had swum. Perfect continuous tenses To form a perfect continuous tense both ‘to be’ and ‘to have’ are used. The main verb is used in the continuous form and the verb ‘to be’ is used in the past participle. Present perfect continuous I have been walking, he has been walking they have been walking. I have been swimming he has been swimming they have been swimming Past perfect continuous I had been walking he had been walking they had been walking I had been swimming he had been swimming they had been swimming |