unless=if not请举出例子

应该是：如果他也去那个派对我就不去（我认为如果这么翻译用too有问题,原句应该是：I will not go to the party unless he goes to there,too.如果他不去我也不去）
eg:I will not go unless I hear from him.
=I will not go if I do not hear from him.
如果他不通知我,我就不去.