说不定

shuō bu dìng

can't say for sure, maybe

不能说

bù néng shuō

Can not say

老师说不

lǎo shī shuō bù

Teacher said no

说不定今天晚上我会加班，等我回家可能会很晚。

shuō bu dìng jīn tiān wǎn shang wǒ huì jiā bān， děng wǒ huí jiā kě néng huì hěn wǎn。

Maybe I will work overtime tonight, and it may be very late when I get home.

他连话都不会说。

tā lián huà dū bù huì shuō。

He can't even speak.

而且我不会说英语

ér qiě wǒ bù huì shuō Yīng yǔ

And i don't speak english

她不愿意跟我说话。

tā bù yuàn yì gēn wǒ shuō huà。

She doesn't want to talk to me.

闭上嘴巴，不要说话。

bì shang zuǐ ba， bù yào shuō huà。

Shut up and don't talk.

我不会说任何外语

wǒ bù huì shuō rèn hé wài yǔ

I dont speak any foreign languages

他甚至不会说中文。

tā shèn zhì bù huì shuō Zhōng wén。

He can't even speak Chinese.

我不同意你的说法。

wǒ bù tóng yì nǐ de shuō fǎ。

I disagree with you.