'This is my house.' How long have you lived here? I ______ (live) here since 1997

\'This is my house.\' How long have you lived here? I have lived here since 1997.

Present Perfect is formed with the help of auxiliary verb to have and the third form of irregular verbs and if the verb is regular + ed.

I have sung. (to sing — sang — sung).

He has driven. (to drive — drove — driven).

You have washed. (to wash — washed).

Negative is formed have / has + not + verb. I have not washed. Short forms are haven\'t and has\'t.

Interrogative is formed have / has + subject + verb. Has he seen?