We dare not to say a word unless she allows us to.
I will be extremly appreciated if you could teach us how to use a computer.
We dare not to say a word unless she permits.
I will be appreciated if you could teach us how to use computer.
We dare not to say a word, unless she requires us to.
It will be much apperciated if you're glad to teach us how to use computer
We dare not say one word unless she permits.
I will be very appreciated if you would teach us how to use the computer