1.去了某地回来了
2.去了某地没回来
3.在某地待着
Has he ever been to Beijing?(他去过北京吗）
He has gone to Beijing.(他去了北京）
He has been in Beijing for two years.(他在北京呆了两年）
already已经（he has already been in Beijing for two years)
yet还(没...)（He hasn't been to Beijing yet.)
1.去了某地回来了
2.去了某地没回来
3.在某地待着
Has he ever been to Beijing?(他去过北京吗）
He has gone to Beijing.(他去了北京）
He has been in Beijing for two years.(他在北京呆了两年）
already已经（he has already been in Beijing for two years)
yet还(没...)（He hasn't been to Beijing yet.)