the GREENS用are ,什么时候用is和are?

the GREENS用are ,什么时候用is和are? The Greens谓语动词用is 还是are the Greens are还是is eating dinner the Greens(格林一家）是三单吗,后面用is还是are? 格林一家正在泰州参观 用英语. The Greens are (. ) (. )(. ) the family什么时候用is什么时候用are The Greens ----having dinners.A,is B,are is 和are的用法什么时候用there is 什么时候用there are? there are none,there is none 用法 什么时候用there are none,什么时候用the Where are the Greens?为什么是are不是is,在什么意思的时候是is, The Greens are English.Now they are in Beijing.This is their 用the is和the are造句