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Lesson 17: Potential Complement

last revised June 3, 2003

Potential complements are placed after verbs to indicate the potential (or lack thereof) to do something. In the negative form, the action described in the main verb takes place, but the result described in the complement cannot be achieved.

Pattern
Usage
Example
English
VComp
affirmative
聽得懂
able to comprehend (what one hears)
VComp
negative
看不懂
unable to understand (what one sees or reads)
VComp VComp
affirmative-negative questions
來得及來不及
is there enough time?

If there is a simple object, it can follow the complement. If the object is long or complicated, it is usually preposed (put at the beginning of the sentence). This pattern looks somewhat similar to other verbal complements you have learned. Most of the same words used in resultative complements and some in directional complements can be used in this pattern as well, but the structure of the sentence is a little different. Contrast these examples:

Type of complement
Pattern
Example
English
directional
tells the direction of the action
(any tense)
V Comp1 Comp2
V Comp1 Comp2
拿出
沒走進教室
He took the book out.
I didn't walk into the classroom.
descriptive
tells how or to what degree the action took place
(past or habitual, can use )
(V-O) V() Adj
(V-O) V Adj
他寫漢字寫得很漂亮
她彈鋼琴彈得不好
He writes Chinese characters beautifully.
She doesn't play the piano well.
resultative
tells whether the result of the action has been achieved
(past)
V Comp
V Comp
看完
沒看完
I have finished reading.
I haven't finished reading.
potential
tells whether the result has the potential to be achieved
(any tense, cannot use )
VComp
V
Comp
黃小姐看得懂日文
老師說的話田先生聽不懂
Miss Huang can understand Japanese.
Mr. Tian can't understand what the teacher says.

English doesn't have an equivalent structure to the potential complement, so the English translations will vary from the structure of the Chinese. A good strategy is to learn some of the combinations as idiomatic expressions. See the partial list below:

Complement
English
Combinations
English
comprehend

聽不懂 / 聽得懂

unable/able to understand (something heard)
看不懂 / 看得懂
unable/able to understand (something seen or read)
finish
做不完 / 做得完
unable/able to finish (the task of doing something)
吃不完 / 吃得完
unable/able to finish eating (the food that is there)
arrive at, reach
找不到 / 找得到
unable/able to find
買不到 / 買得到
unable/able to buy (because unavailable)
perceive
看不見 / 看得見
unable/able to see
聽不見 / 聽得見
unable/able to hear
know how to do something
學不會 / 學得會
unable/able to learn
remain fixed
記不住 / 記得住
unable/able to retain in memory
do something well
睡不好覺 / 睡得好覺
unable/able to sleep well
做不好 / 做得好
unable/able to finish (a task) well
學不好 / 學得好
unable/able to learn well
打不好 / 打得好
unable/able to play ball well
清楚
clear
聽不清楚 / 聽得清楚
unable/able to hear clearly
看不清楚 / 看得清楚
unable/able to see clearly
說不清楚 / 說得清楚
unable to express clearly
move
拿不動 / 拿得動
unable/able to pick up and move (something)
走不動 / 走得動
unable/able to walk
起來
(idiomatic)
想不起來 / 想得起來
unable/able to think of (something)
go down, capacity to hold
吃不下 / 吃得下
unable/able to get food down
(because too full or food is not good to eat)
坐不下 / 坐得下
unable/able to seat that many people
go
進不去 / 進得去
unable/able to go in (because not enough room)
come
帶不來 / 帶得來
unable/able to bring (something)
出來
come out
看不出來 / 看得出來
unable/able to tell (that something is the case) by looking
聽不出來 / 聽得出來
unable/able to tell (that something is the case) by listening
(idiomatic)
來不及 / 來得及
unable/able to do something on time

(here pronounced as "liao3")
complete
(also a neutral complement)
忘不了 / 忘得了
unable/able to forget
吃不了 / 吃得了
unable/able to eat (such a large quantity)
買不了 / 買得了
unable/able to buy (because money is insufficient)

 

 

 
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