英语语调漫谈 (4) - 五种语调的例子：

I am looking for a CAR. - rising falling tone. (highlighting, to express his emphasis of the "CAR": 5)

OKay.  - falling rising tone (implication, yes, to acknowledge,  questing more information : 4)

for a new car? - rising tone.              (questionig: 2)

No, for a used car. - falling tone (stating a fact, certainty: 1)

Note:
1 代表降调  falling tone
2 代表升调  rising tone
3 代表平调  level tone
4 代表降升调  falling-rising tone
5 代表升降调  rising-falling tone