In afraid I ..... my mobile telephone at home. 1.forgot 2.have

Im afraid I have forgotten my mobile telephone at home. Опасаюсь, я пренебрегал собственный мобильный телефон дома.

We use Present Perfect in the second part of the sentence. Present Perfect is used for a past action which result connects with present. Present Perfect is formed with the help of the auxiliary verb to have and the third form of verb. We use has for the third person singular.

He has forgotten.

Negative have / has + not + the third form of the verb.

 I have not forgotten.

Interrogative Have / has + subject + the third form of verb.

 Have I forgotten?