今、ここがパリならばなあ。

now; the present time; just now; soon; immediately; (one) more

here (place physically close to the speaker, place pointed by the speaker while explaining); this place; these last (followed by a duration noun and a past sentence: time period before the present time of the speaker); these next ... (followed by a duration noun and a non past sentence: time period after the present time of the speaker); the next ...

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

Paris (France)

be; is; indicates past or completed action; indicates light imperative

hey; say; look; used to get someone's attention or press one's point