Do I always need to furrow my eyebrows when signing 'how'?
Yes, if you are asking a question. In ASL, 'wh-' questions (who, what, where, when, why, how) require you to furrow your eyebrows and tilt your head slightly forward.
Is the sign for 'how much' the same as 'how'?
No, 'how much' or 'how many' uses a completely different sign. For 'how much', you start with closed fists and toss both hands upward while opening them into '5' handshapes.
Can I sign 'how' with just one hand?
While the standard dictionary sign uses two hands, in fast or casual conversation, some signers might only use their dominant hand. However, beginners should stick to the two-handed version for clarity.