This is a boy and a girl. 为什么不说these are a boy and a girl.
This is a boy.This is a girl.This is a boy and a girl.是分开来的。除非不是一起说的,就像These are the girls.These are the boys.These are the children.
"boy and girl "是特指
语感
This is a boy.This is a girl.This is a boy and a girl.是分开来的。除非不是一起说的,就像These are the girls.These are the boys.These are the children.
"boy and girl "是特指
语感