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

• if the tea is too strong, add some more hot water.
  如果茶太濃了，再加點開水。
• after a short while, he added that he would try his best.
  過了一會兒，他又接著說他會盡力。

• the bad weather added to our difficulties．
  惡劣的天氣增加了我們的困難。

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

• all his school education added up to no more than one year.
  他的學校教育加起來不過一年。

動詞 add to:

1. have an increased effect

1. I have nothing to add to my earlier statement.
   我對我先前說的話，沒有什么補充的。
2. Being still hale and hearty in spite of his seventy years, my father was able to add to his pension by selling vegetables from his garden.
   我的父親盡管70高齡，身體仍很硬朗，還能把菜園子里的菜挑出去賣，以掙些零化錢。
3. I didn't want to add to Mother's misery.
   我不愿意增加母親的痛苦。
4. The function of an adjective is to describe or add to the meaning of a noun.
   形容詞的作用是描述或增加名詞的意思。