they are next to us；
their classroom is next to ours；
分情况，关键看句子主语是什么。
next to
几乎，差不多；紧挨着；居于…之后
例句
She curled up next to him.
她蜷卧在他身边。
She sat down next to him on the sofa.
她在沙发上靠着他坐下来。
Can I sit next to you?
我可以坐在你旁边吗？
