未必

tā wèi bì huì zhī dào

他未必会知道。

He doesn't necessarily know.

zhè xiē shì qing wèi bì huì rú cǐ

这些事情未必会如此。

Things may not necessarily turn out that way.

zhè xiē xiāo xi wèi bì kě xìn

这些消息未必可信。

This information is not necessarily reliable.

wèi bì kě néng

未必可能

may not be possible

wèi bì rú cǐ

未必如此

not necessarily so

wèi bì quán duì

未必全对

not necessarily all correct

tā wèi bì huì lái

她未必会来。

She may not come.

nà wèi bì shì duì de

那未必是对的。

That is not necessarily true.

gāi xié yì zài qí tā guó jiā wèi bì zhàn de zhù jiǎo

该协议在其他国家未必站得住脚。

The agreement is not necessarily valid in other countries.