To lie down to sleep, to put oneself in one's bed(verb)
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Use "go to bed" in a sentence
"“Too many parents go to bed each night praying that one day their child will look them in the eye, smile and say, ‘Mommy,’ ” Suzanne Wright wrote in a Newsweek essay."
"And if you grab two biscuits from the breadbasket, eat two burgers off the grill, or have a few cookies before you go to bed at night … You get the idea."
"In London, he snubbed an invitation to dinner from the Prince of Wales—“Tell him that I always go to bed at half-past nine”—but took breakfast with Wilfrid Blunt and donated to the Urabi Defense Fund.29"