I did go to college x I went to college: Qual a diferença

Steave Jobs Said I did go to college. Is itens correcto?

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Both are correct, however, the auxiliary verbs DO - DOES and DID can also be used in affirmative sentences to express emphasis. In a speech, the auxiliary is stressed!

Observe these phrases:

I DO know what you mean;
He DOES travel a lot,
I DID want to write, but I forgot.