The conjugation will (to be) is part of the future tenses, while the word can is used by itself to mean a present ability, or as an auxiliary verb.
Will and shall are used in :
The auxiliary verb "can" is used with the infinitive verb form (without to) to indicate an ability to perform the action. (e.g. I know how to drive, therefore I can drive.) The past tense or conditional tense is "could".
*Most grammaticists insist on using "may" for permission, so the expression "can I get the ball" would ask about your ability to get it, not whether you were allowed to.
i do not know how to use embalming in a sentence. (there is the sentence)
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.
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.. how can use scrum in a sentence
"I can use 'salutary' in a sentence!"