those(那些)，these(這些)，開頭的陳述句，它的反義疑問句後面簡短問句的主語要用人稱代詞they，但前後仍然遵循前肯後否或前否後肯的原則，舉例說明，Those are sheep， aren't they
意思是:那些是綿羊，不是嗎
These aren't flowers， are they
意思是:這些不是花，對嗎
those， these引導的反義疑問句
These are students. Those are teachers. Are these students? Yes，these are./No，these aren't. Are those teachers? Yes，those are./No，those aren't.
