Translation:You don't eat at night
The translation of 'tonight' is: usiku wa leo. So, if you want to say 'you don't eat tonight' it would be Hamli usiku wa leo; if on the other hand it is meant that you don't eat at night (time), the translation would be Msile usiku, or even better Msile usiku usiku.
Read the notes for the present skill. You will find that the ku- has been removed Ham- means You (all) don't, and -la has become -li to make it negative.