My mother and shall or will go to concert tonight.
To determine whether to use "shall" or "will" in this sentence, you need to consider the subject and the verb tense.
In modern English, "shall" is typically used with the first person pronouns "I" and "we" to express a future action or give a command. On the other hand, "will" is used with other subjects to indicate future actions.
In your sentence, the subject is "My mother and I," which is first-person plural. Therefore, the correct choice is "shall." The correct sentence would be:
"My mother and I shall go to the concert tonight."
However, it's worth noting that in informal modern English, the distinction between "shall" and "will" is often ignored, and "will" is used in all situations. So, if you prefer, you can simply say:
"My mother and I will go to the concert tonight."