During a famine there are shortages of food.
The storm damage had led to shortages of electricity in some areas of the country.
i do not know how to use embalming in a sentence. (there is the sentence)
It was hard in WW2, with rationing and shortages of necessities, so mostly people had to make do and mend, re-use or just be out of supplies.
They de-salinate seawater.
Food Shortages Started in 1915 In Russia
FOOD shortages caused unrest.
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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