不得不知道

不得 buˋ deˊ

(Am not, Are not allowed, Cannot, Is not, Must, Not be, Was not, Were not) Cannot, Must not, To not be allowed, Am not allowed, Are not allowed, Is not allowed, Was not allowed, Were not allowed

不得不 buˋ deˊ buˋ

(Had to, Have to, Must) Have to, Had to, Must

不知 buˋ zhiˉ

(Not know, Not knowing) Not know, Not knowing

不知道 buˋ zhiˉ daoˋ

(Didn't know, Doesn't know, Don't know, I didn't know, I don't know) Don't know, Doesn't know, Didn't know, I don't know, I didn't know

知道 zhiˉ daoˋ

(Knew, Know, Knowing, Known, Knows, To know) Known, To know, Know, Knows, Knowing, Knew