知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。
"Do you want to schedule a meeting?" is very straightforward. It is inquiring if the person …
What have you done用的是现在完成时态，它表示从过去延续到现在，对现在造成的结果和影响。 …
Positive: You said it. Negative: You did not say it. = You didn't say it. Question: Did you say …
否在did上面了 而时代在进步, 这个 助动词 在通常的句子里, 和动词连用的情况下, 人们发现, 说不说这个 …
更多内容请点击：知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题 ...