Usages of wánchéng
我 已经 完成 工作。wǒ yǐjīng wánchéng gōngzuò.
I have already completed the work.
请 今天 完成 这 份 报告。qǐng jīntiān wánchéng zhè fèn bàogào.
Please complete this report today.
我 完成 了 今天 的 任务。wǒ wánchéng le jīntiān de rènwu.
I completed today's task.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.