Question

he was tired，so we sent him to （the）bed 有没有the 为什

he was tired，so we sent him to （the）bed
有没有the 为什么 意思有什么不同

Answer 1

bed前面如果加冠词，是具体名词：床铺的意思。不加冠词，则是抽象概念，上床睡觉、休息。就像：go to bed,
He got out of bed and pulled on his bathrobe.
他起床后穿上了晨衣。
来自柯林斯例句
3. I was laid up in bed with acute rheumatism.
我染上了急性风湿，卧病在床
in the bed在床铺上，如下句：
He was already asleep in the bed, which smelled faintly of mildew.
他已经在略带霉味的床上睡着了。
来自柯林斯例句

追问

意思就是不加the 就是送到床上 加the就是送去睡觉？

追答

相反。send sb to bed 是睡觉、休息，意思：叫某人去睡觉；打发某人睡觉

Answer 2

不加就是送去睡觉，加就是送到床上，有可能不是睡觉，只是把人送到床儿子

追答

送到床上儿子

送到床上而已