还没有确定英文

My sister is not sure.

我还没确定的英文(1) I have not decided yet (2) I have not made up my mind yet (3) I have not made my decision (3) I am still kept in uncertainty (4) I still remain undetermined / undecided

The date is still in the air.更生动

英文是：The date hasn＇t been set yet

重点词汇：been

英［bi：n］

释义：

v.是，有（be的过去分词）

n.（Been）（美）贝恩（人名）

短语：

Never Been Kissed一吻定江山；一吻定山河；从未咀过；从未被吻过

例句：

Our partnership dates back to（ie We have been partners since）1960.

我们从1960年就合伙了。

A 1000 reward has been offered for the return of the stolen painting.

悬赏1000英镑寻找失窃的画。

The date has not been decided yet.

I'm not sure now

It's not sure that who will pick him up.