如果你不说谎，你就无法活下去。

'If you don't fib, you don't live.'

youdao

如果你不说，他对于你的需求是无从得知的。

But he won't know what you want unless you tell him.

youdao

如果你不说的话，老师又怎么会知道你有问题，你需要帮助呢？

If you don't say, the teacher how can knows that you have a problem again and do you need help?

youdao