名师点金:unless考点解析
⑴unless意为“除非,如果……不”,相当于if … not…
You will fail unless you work harder.
= You will fail if you do not work harder.
你要是不再努力些,就要失败。
She won’t lose weight unless she keeps a diet and takes exercise every day.
她如果不天天锻炼并节食,她是不会减重的。
⑵常见引导条件状语从句的引导词还有:
①if意为“如果,假使”,所用时态为“主将从现”;
②as/so long as只要
③on condition that如果……,条件是……。
He said he would come to the meeting on condition that no one asked him to speak.
他说他将出席这个会议,条件是不要让他发言。