Shall is only has one tense (future).
I will/shall investigate
will drip or shall drip
Shall go or will go.
The Future tense of migrate is "Will migrate", the word (will) or (shall) can be use when the sentence is future. EX: My parents (migrate) "will migrate" to Canada next year
Will care or shall care, depending on the context.
The verb 'may' is the future tense as a word expressing possibility.Example: It may rain tomorrow.An alternate future tense of the verb may is 'shall'.Example: It shall rain tomorrow.Note: The verb 'may' is the present tense as a word expressing permission.Example: You may go to the mall with Jane.
The word "stole" is the past tense of the verb "to steal" (rob, pilfer).The simple future tense is "will steal." (less frequently shall steal)
To conjugate the future tense of the verb "to be" requires the subject. For example: I shall be = eh-hyeh (××”×™×”) we shall be = ni-hyeh (× ×”×™×”) as for what it means, well it means the future tense of the verb "to be"
The word be is a verb, with irregular conjugation except in the future tense (will be, shall be).