yet never ever for since 这些词的用法及区别
“Already”意为“已经”，例如：“He has already eaten breakfast.”
“Yet”用于句末，例如：“He has not had any milk, yet.”
“Ever”意为“曾经”，常用于现在完成时的疑问句中，例如：“Have you ever had French food?”
“For”后跟一段时间，例如：“I ate breakfast yesterday.”
“Already”意为“已经”，例如：“He has already eaten breakfast.”
“Yet”用于句末，例如：“He has not had any milk, yet.”
“Ever”意为“曾经”，常用于现在完成时的疑问句中，例如：“Have you ever had French food?”
“For”后跟一段时间，例如：“I ate breakfast yesterday.”
