Word: 成天 (chéngtiān) 成天 dictionary entry chéngtiān all day long; all the time Full dictionary entry for 成天 Example sentences using 成天 2 sentences, showing page 1 of 1. 我弟弟成天待在房间里打游戏。 Wǒ dìdi chéngtiān dài zài fángjiān lǐ dǎyóuxì. My younger brother stays in his room playing games all day long. 我爸爸成天在花园里忙来忙去。 Wǒ bàba chéngtiān zài huāyuán lǐ máng lái máng qù. My dad is busy in the garden all day long.