Correct

一天

/ yī tiān /
Strokes

Definition

one day

Example

As a Noun

a day

1
tiān
yòu
tiān

day after day

As a Noun

the whole day; all day long

2
tiān
shuǐ
滴水
wèi
jìn

have had nothing the whole day

As a Noun

one day (in the past)

3
tiān
  
,
rán
突然
huílai
回来
le
  

One day, he came home unexpectedly.