Please choose the right expression

1. As a Korean / As myself being a Korean / As being a Korean / A Korean, I think blah blah....

- Are all of these okay to use?

2. My girlfriend and I were talking the other day. (on Feb. 27)


M : Do you have the day off tomorrow? (assuming tomorrow is March first, which is a national holiday)

W : No, I don't.

M : (after seeing a desk calendar) Oh, I thought ______________

(a) I thought it would be March first.

(b) I thought it was March first.

(c) I thought it would have been March first.


- which one is right?

3. Please have a look at this article

In the early weeks of their life, normal health infants may seem to have limitless
cognitive potential for attending to all those aspects of the human environment of
relevance for their existence. In fact, however, infants do not take in all of
the stimuli they are exposed to; they filter them. As they grow, selective exposure
to certain experiences prove to mean that all the possibilities will not be
actualized. An adult's construction of reality is the actualization of one spectrum
of possibilities and, by its existence, renders impossible the emergence of others.

- Someone told me the underlined part of sentence was grammartical, explaining that if an object is long enough, an inversion between object and complement can occur.
Is this true?

Thank you.