used for saying that if something does not happen , something else will happen or be true as a result 如果不；除非 | I can’ t help you unless you tell me what’ s wrong. 如果你不告诉我出了什么事，我可帮不了你。 |
| The car should be in the garage unless someone’ s moved it. 如果没有人动它，车应该在车库里。 |
| Unless you come now, I’ m going to leave without you. 如果你不马上来，我就不和你一块走了。 |
| Owen wouldn’ t eat anything unless he’ d cooked it himself. 如果不是他亲自下厨做的东西，欧文就不吃。 |
| not unless (=only if) ‘Are you going to stay overnight?’ ‘Not unless it’ s absolutely necessary.’ 除非 |