“他不太聪明，是吧？” “不，恐怕不是。”

"He's not very bright, is he?" "___No, I'm afraid not."

“今天不冷，是吧？” “不，挺暖和的。”

"It's not cold today, is it?" "___No, it's quite warm."

“你没看到我的钥匙，对吧？” “不，我没看到。”

"You haven't seen my keys, have you?" "___No, I haven't."