yes
1.关于yes和no的区别，参见no 1
2.下面每组里的三句意思相同：
- He is ready, yes, eager to help us.
He is ready, yes, and eager to help us.
He is ready, nay, eager, to help us. - She has read, yes, studied all these essays, carefully.
She has read, yes, and studied all these essays, carefully.
She has read, nay, studied, all these essays carefully
3.下面对话里的yes and no表示“不能说定”：
- A: Did you convince him?
B: Well, yes and no.
