Grammar point: to learn the difference between ‘shall’ and ‘will,’ go to: Grammar Girl: "Shall" Versus "Will"
Grammar point: ‘bid,’ when used as in the above expression “to offer,” “to invite,” or “to command,” used to be inflected with the simple past form of “bade” and the past participle form of “bidden.” You can still find these forms in English, especially when used in the expression to say goodbye: '”to bid farewell.”
However, these forms, though you may still see them, are starting to disappear from contemporary English. Today it is more common to us the irregular, noninflected form of “bid,” which follows the model of other irregular verbs such as “cut” or “cost.”
If “bid” has any other meaning such as '”offering a particular amount of money” for something, then in today’s English, it is only used with its noninflected form.