Leonard: Hi, I’m Leonard, this is Sheldon.

Sheldon: Hello.

Leonard: What did I just…. Uh, we’re here to pick up Penny’s TV.

Voice: Get lost.

Sheldon: Okay, thanks for your time.

Leonard: We’re not going to give up just like that.

Sheldon: Leonard, the TV is in the building, we’ve been denied access to the building, ergo we are done.

Leonard: Excuse me, if I were to give up at the first little hitch I never would have been able to identify the fingerprints of string theory in the aftermath of the big bang.

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Above is an excerpt from the American drama, 'Big Bang theory'.

The underlined part refers to the past or future?
Past. Compare "would have been" with "will be".
Thanks JoshStafford!!
Students: We have free audio pronunciation exercises.
Unrelated to the question at hand, Big Bang Theory is a comedy, not a drama. (Just thought I'd work on your vocabulary while this thread was open.)
Thanks Grammar Geek....

But, I can't seem to be following you....

work on my vocabulary?

What vocabulary?

I'd love to be worked on my vocabulary by you, but I don't see any vocabulary work-on here...

Please enlighten me!!
The vocabulary words I meant were "comedy" and "drama."

Since you used the wrong word, I thought I'd point that out so you could make sure you had those two vocabulary words properly sorted in your head.
Students: Are you brave enough to let our tutors analyse your pronunciation?
Yes, Yes....

I see, Grammar Geek....

Many thanks!!