their parents gave birth to them中的birth要用复数吗?

• their 后面不是应该接名词复数吗？
• give births to
• everyone have their own opion of……这里面的opion应该用复数形
• their 后面加单数还是复数

their 后面不是应该接名词复数吗？

, some pet owners 是复数 所以形容性物主代词才用their，与后面的无关

give births to

give birth to就是生孩子的意思，固定结构。但不是births，而应该是birth

everyone have their own opion of……这里面的opion应该用复数形

单数，everyone是主语

their 后面加单数还是复数

根据需要单复数均可。

看their是指哪些人,后面指那些事。

their own house （他们是一家人）,他们自己的房子。

their own houses （他们不一定是一家人）,他们自己的房子。