bostezo 用英语:

Jason yawned, but seemed to be paying attention.

I suppressed a yawn.

They were all so tired that they could do nothing but yawn.

He looked at his watch and yawned.

Yawn a big long yawn.

We yawn when sleepy or bored.

It’s rude to yawn without covering your mouth.

you have been yawning for an hour

don't yawn at the table; he's a real yawn

He couldn't stop yawning!

I keep yawning when I'm tired and all I want is sleep.

I am yawning because I feel sleepy

Most of the students looked bored and yawned throughout the lecture.

Members of the audience started yawning after he had been talking for over an hour.

a yawn is that typical reaction of someone who is bored