imperfect

详细解释:a. 不完美的, 不完整的, 减弱的, 未完成过去时的
n. 未完成体

词型变化：

名词:imperfectness副词:imper-fectly

英语解释：

名词 imperfect:

a tense of verbs used in describing action that is on-going同义词：progressive, progressive tense, imperfect tense, continuous tense