add
1.add是“把…加上去”，不是“增加”。例如：They have decided to add ¥20 to his wages. “增加”用increase或raise。例如：They have decided to increase (或raise) his wages to ¥100 a month. 但add to作“增加”解，如That will add to my pleasure和That may add to his difficulties。
2.add(s) up to （1.总合起来成为2.意味着）似乎是最近一二十年新出现的习语，偶尔省去up。例如：
- All these facts add up to a picture of happiness.
- What it all adds up to is that you have learnt a good lesson.
- Everything you say adds up to justice.
