Not only his parents but also his sister --- to see his grandparents.They haven`t come back yet.
问题描述：
Not only his parents but also his sister --- to see his grandparents.They haven`t come back yet.
为什么要用has been而不是has gone去了呢
答
弄错了吧?正确的就是 has gone ( 人不在这里,去了某地了） 根据后面的 They haven't come back.他们还没有回来‘ 可知
而 has been 曾经到过某地‘ （去了又回来了）
如果不明白,请再问；如果对你有所帮助,
请点击本页面中的“选为满意回答”按钮,没有弄错啊那就是答案错，
正确的一定是has gone
（ 注：not only... but also 作主语时谓语动词是‘就近原则’ sister 是单数，故用hasgone
翻译： 他的父母亲和姐姐都去看望他爷爷奶奶了。 他们还没有回来。