What's the difference between before and now?

Before

Definition:

• (prep.) In front of; preceding in space; ahead of; as, to stand before the fire; before the house.
• (prep.) Preceding in time; earlier than; previously to; anterior to the time when; -- sometimes with the additional idea of purpose; in order that.
• (prep.) An advance of; farther onward, in place or time.
• (prep.) Prior or preceding in dignity, order, rank, right, or worth; rather than.
• (prep.) In presence or sight of; face to face with; facing.
• (prep.) Under the cognizance or jurisdiction of.
• (prep.) Open for; free of access to; in the power of.
• (adv.) On the fore part; in front, or in the direction of the front; -- opposed to in the rear.
• (adv.) In advance.
• (adv.) In time past; previously; already.
• (adv.) Earlier; sooner than; until then.

Example Sentences:

Now

Definition:

• (adv.) At the present time; at this moment; at the time of speaking; instantly; as, I will write now.
• (adv.) Very lately; not long ago.
• (adv.) At a time contemporaneous with something spoken of or contemplated; at a particular time referred to.
• (adv.) In present circumstances; things being as they are; -- hence, used as a connective particle, to introduce an inference or an explanation.
• (a.) Existing at the present time; present.
• (n.) The present time or moment; the present.

Example Sentences: