teny are all American 改为同义句怎么改?

They are all American.
= They are all Americans.
= All of them are American/Americans.
= They all come from America.
= All of them come from America.
= They are all from America.
= All of them are from America.
注：Americans是名词American“美国人”的复数形式；而用American的单数形式时,它是一个形容词.