示例
A：I can't eat shrimp because I am allergic to it.
B：Why didn't you say so?
A：我不能吃虾，过敏。
B：为什么不早说？
A：Why didn't you say so?
B：I thought it would bother you, so I didn't tell you.
A：为什么不早说？
B：我怕影响你，就没说。