成天的用法和样例：
例句
-
这个地方的电视成天开著。
The TV stays on all day at this place. -
如果你们成天游手好闲，就永远也成不了好学生。
You will never be good students so long as you goof around. -
吉姆的子女都成家了，他成天都呆在家里不出门。
Jim's children are married and he stays at home all the time. -
她成天唠唠叨叨地找他岔子。
She nagged at him all day long. -
成天给信封写地址是一种沉闷单调的工作。
Addressing envelopes all day long is dreary work.
