like: You couldn → →
1897
I can speak a little French. — You can? But earlier you said you couldn't. ☊ 
Tôi biết nói một chút tiếng Pháp. - Thế ư? Nhưng trước cậu bảo cậu không biết cơ mà. ☊ All this has happened because you couldn't be bothered to give me the message. ☊ can't be bothered (to do sth) ☊
She was certainly attractive but you couldn't call her beautiful. ☊ certainly ☊
You couldn't have left it on the bus, could you? ☊ could ☊