Unit 340
Why do you only have a glass of water in front of you each lanch time?
Why aren't you eating?
I am on a diet.
I am tasting/eating something.
icecream cone 冰淇淋甜筒, drool 流口水
She is drooling.
But she can't eat anything.
Because I'm on a diet.
to be on a diet
I'm on a diet for my health.
to go on a diet 表动态
Because I'm overweight(=fat), I decided to go on a diet.
How many times have you decided that?
Many many times.