[案例一]

T: Pair work, please.

S1/S2: Are you taller than S3?

S2: Sorry, I’m not sure.

T: Ask him, please.

S2/S3: What’s your height, S3?

S3: I am … centimetres.

S2: Oh, you are …centimetres taller than me. (学生即时口算与他人的身高差距有一定的难度，对话因此卡壳)

[案例二] （改进）

T: Write your height/weight in this sheet. (Ss do it.)

T: Do a survey like this.   Q: Excuse me, what’s your height/ weight,…?

Name:             

Height:             cm

Weight:             kg

T: （Show a model.）

S1/S2: Are you taller than S3?

S2: Yes, I am./ No, I’m not. I am …centimetres shorter than…

(与调查表对比得知)

S1/S2: Then what’s your height?

S2: I am … centimetres.

S1: Oh, you are …centimetres taller than me. Guess, what’s my heigh？