Correct

成天 vs 整天

/ chéngtiān vs zhěngtiān /
Strokes

Definition

成天 as an Adverb, 整天 as a Noun, which means [the whole day; all day long].

Example

成天 is an Adverb and can only function as the adverbial. It means everyday, from day to night.
Sometimes it takes 价(jie) after it.
1
máng
de
chéngtiān
成天
zhāo
jiā
  

He is so busy that he never stays at home for a moment.

2
Zhè
zi
屋子
cháoyīn
朝阴
  
,
chéngtiān
成天
jiàn
不见
tàiyang
太阳
  

The house faces north and the sunshine cannot shine into it.

3
píng
平日
chéngtiān
成天
  
(
jie
  
)
dāi
zài
jiā
家里
  
,
hěn
shǎo
chūmén
出门
  

She always stays at home and rarely goes out.

整天 is a noun meaning one whole day, but not every day.
4
le
zhěngtiān
一整天
qiáopái
桥牌
  

I played Bridge for a whole day.

5
zhěngtiān
一整天
gōngzuò
工作
xiàlai
下来
  
,
juéde
觉得
yǒudiǎn
有点
lèi
  

I felt a little tired after a whole day's work.

整天 can also function as the adverbial and can take 价(jie) after it; sometimes it has the same meaning and usage as 成天.
6
háizi
孩子
zhěngtiān
整天
wán
diànnǎo
电脑
  

The child played with computers all day long.

7
zhěngtiān
整天
  
(
jie
  
)
yóushǒuhǎoxián
游手好闲
de
  

He is idle all day long.

Related

整天成天