請問英文怎樣寫

“不知道要寄出” 英文怎樣寫？
Didn't know it / that should be mailed
OR
Didn't know (I / we) should send it by post

mail 或 post 作動詞用是指 ‘寄出信件(letters)或包裹(parcels or packages)’等。
必定要用 past tense ‘didn't know’, 因為你說或寫這一句時已肯定知道要寄出那些東西, 不能用 ‘don't know’。所有之前不知道的/忘記的, 現在知道/記起了, 需要用過去式動詞如 ‘I didn't know that’、‘I forgot to bring the bag’。

Do not " know that send "

I do not know it should send .

don't/doesn't/ didn't(past) know how to send __________

2007-06-29 15:43:00 補充：
sorry,it is do not/ does not/ did not(past tense) know how to send _________

Don't know and send out