add當加法的使用方式

add是及物動詞，應寫作: Add one and one and you have two.
或One added to one makes two.(此處的added是分詞當修飾語）

plus在本句是當介系詞用，本句的動詞是is。介系詞plus和動詞add不能互換。

2011-11-11 10:22:08 補充：
One add one is two.不正確。因為主要動詞鬧雙胞。

2011-11-11 14:53:48 補充：
Macmillan English Dictionary for Advanced Learners 2007 edition p.17

quoted
to put numbers or amounts together to caluclate their total: What do you get if you add 75 and 63?
unquoted

2011-11-11 14:55:02 補充：
Cambridge Advanced Learner's English Dictionary 2003 edition p.14

quoted
If you add (=calculate the total of) three adn four you get seven.
unquoted

2011-11-11 15:31:20 補充：
When you add A to B, A becomes a part of B.
But when you add A and B, A is not a part of B.
The sum of A and B will be C.

add one and another one you get two.
add one and another one and another one you get three.
add one and two you get three.
add two and another two you get four.

Add one and one and you have two. (X)
Add one to one and you have two. (O)

Hi,

plus不可代替add使用
因為 add 之後必須加不定詞 to , add在這裡的中文解釋為附加,增加
例句: A 10% service charge is added on to the bill.

plus used when two numbers or amounts mentioned are being added together.
例句: The cost is $5, plus $1 for service charge.