不知凡几的英文

can't tell how many there are -- numerous similar cases

• 李知凡太太:    madam li zhifan
• 不知:    1.(不知道) not to kno ...
• 不知为不知:    know is know nokno ...

例句与用法

1. While liu led his army to shan - shi province , he met an acquaintance li tzeng - shu in shi - an city
   于是防范稍懈，刘氏越垣夜遁，从其后而欲脱逃者，不知凡几！