he has already been to nearly every country in the world句中,been的用法有时加to,有时不加to,请问什么情况下才需要加to?
问题描述：
he has already been to nearly every country in the world
句中,been的用法有时加to,有时不加to,请问什么情况下才需要加to?
答
后面是完成时态就不加to,反之则加。
答
加不加to不是看been,而是看后面的词,to表方向,every country前就要加to1）have+been +过去分词,构成完成式被动语态,例如：English has been taught in China for many years.(中国教英语已经多年.) 2)现在完成进行时...