Bid and Bade

Bid means command, order, insist, invite or require.

• I bid you to join our party. (= I invite you to join our party)
• The government bids all citizens to pay the tax.

Bid can also mean offer a price for something. When it is used with this meaning, its past tense is bid.

• He bid $1000 for the painting.
• At least 10 companies have bid for the contrast.

When bid means say a farewell or greeting to someone, its past tense is bade.

• The soldier bade his wife good-bye.