いかが

いかが is the polite form of どう, used to ask about conditions or make offers in formal situations.

COMPARISON:

• いかが: how (polite/formal)
• どう: how (neutral/casual)

COMMON PATTERNS:

• 〜はいかがですか: Would you like ~? (offering)
• いかがでしょうか: How would this be? (suggestion)
• ご気分(きぶん)はいかがですか: How are you feeling?
• ご調子(ちょうし)はいかがですか: How are things?

USAGE:
いかが is commonly used by service staff, in business settings, and when speaking to customers or superiors. It sounds more refined than どう.

CAUTION:
Using いかが in casual conversation may sound stiff or overly formal. Use どう with friends and family.