是否

tā shì fǒu néng lái hái bù què dìng

他是否能来，还不确定。

It's not certain whether or not he can come.

wǒ bù xiǎo de tā shì fǒu huì dā ying

我不晓得他是否会答应。

I don't know if he will agree or not.

shì fǒu néng qǐng tā gěi wǒ men chàng yī duàn jīng jù

是否能请她给我们唱一段京剧？

Shall we ask her to sing a passage of Beijing opera?

shì fǒu shǔ shí

是否属实

Whether or not it is true.

wǒ bù zhī dào shì fǒu yào gào su nǐ

我不知道是否要告诉你。

I wonder if I ought to tell you.

shì fǒu hé shí jì xiāng fú

是否和实际相符

Whether or not it corresponds to reality.

wǒ bù xiǎo de tā shì fǒu zài jiā

我不晓得她是否在家。

I wonder whether she's at home or not.

wǒ men yīng gāi hé duì yī xià zhāo mù shì fǒu yǒu wèn tí

我们应该核对一下招募是否有问题。

We should check whether there is any questions about recruitment.