have(has) gone to,have(has) been to和have(has) been in的区别 1. have (has) gone to表示"已经去某地了",不能与for+一段时间连用。 She has gone to Shanghai.(她可能已在去上海的路...
But now, places have been found on earth that are in total blackness such as caves several miles beneath the ocean. And bacteria, primitive forms of life, have been seen there。意为科学家一直以为光是很重要的,但是现在他们发现完全黑暗的地方—比如几英...
更多内容请点击：高中英语语法知识点总结:完成时