关于yet用法请教： Why have we had no visitors from outer space yet

we have as yet found no obstacle yet Have you had dinner yet 英语 关于yet的用法 18.- Have you found Jennifer yet - No ,we still have no ____ i have not had any change yet Have you had your lunch yet? 英语翻译1、we make no vows to a best frieng yet we have unstated 英语翻译Have we been best friends yet? We have invited ___to the party ,but no one has answered yet 关于英语yet在句子中的用法 关于英语中yet的解释用法. I fly,yet I have no wings.I cry,yet I have no eyes.Darkness