add

add, add to, add...to, add up to

都是add的固定搭配词组。
add: 作“加，增加”解时，既可作及物动词，又可用作不及物动词；作“又说，补充说”解时，与直接或间接引语连用。

• if the tea is too strong, add some more hot water.
  如果茶太浓了，再加点开水。
• after a short while, he added that he would try his best.
  过了一会儿，他又接着说他会尽力。

add to: 意为“增添，增加，增进”。

• the bad weather added to our difficulties．
  恶劣的天气增加了我们的困难。

add...to: 意为“把......加到......”，是把前一项加到后一项之后或之中。

• add two to seven, and you will get nine.
  七加二等于九。

add up to: 意为“加起来总共是／累计得”，该短语不用于被动语态。

• all his school education added up to no more than one year.
  他的学校教育加起来不过一年。

名词 add:

1. a condition (mostly in boys) characterized by behavioral and learning disorders
   同义词：attention deficit disorder, attention deficit hyperactivity disorder, ADHD, hyperkinetic syndrome, minimal brain dysfunction, minimal brain damage, MBD

动词 add:

1. make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
2. state or say further
   同义词：append, supply
3. bestow a quality on
   同义词：lend, impart, bestow, contribute, bring
4. make an addition by combining numbers
   同义词：add together
5. determine the sum of
   同义词：total, tot, tot up, sum, sum up, summate, tote up, add together, tally, add up
6. constitute an addition

1. Add up all the money I owe you.
   把我应付你的钱都加在一起。
2. If you add 4 to 5, you get 9.
   四加五等于九。
3. He added some wood to increase the fire.
   他加了一些木柴，使火旺些。