主格：they
宾格：them（动宾、介宾用法）
形容词性物主代词：their
名词性物主代词：theirs =their+名词 扩展资料
一、they
pron.她们；他/她/它们；人们
例句：They may be able to help with childcare.他们可以帮忙照料孩子.
二、them
pron.他们；它们；她们
例句：We cannot boss them into doing more 我们不能再差遣他们做更多的事了.
三、their
pron.他（她，它）们的；在提及性别不详的.人时，用以代替 him 或 her
例句：Horses were poking their heads over their stall doors. 马儿们从马厩门上探出头来.
