What's the difference between how and now?

How

Definition:

• (adv.) In what manner or way; by what means or process.
• (adv.) To what degree or extent, number or amount; in what proportion; by what measure or quality.
• (adv.) For what reason; from what cause.
• (adv.) In what state, condition, or plight.
• (adv.) By what name, designation, or title.
• (adv.) At what price; how dear.

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: