Estructuras Gramaticales Con el Verbo ToBe

Hi, today I'll talk about the grammatical structure of the verb to be, in this case we havechosen the word I am, then you will some examples of which is grammatical and examples of them

1. Presente Perfect/ Past Perfect: 

-Had I  been there

2. Past:

- Week I went last week to play football

3. Present:

-I am a software engineer