1. 完成 (wán chéng): This is the most common and general way to say "finish". It means "to complete" or "to accomplish".
2. 结束 (jié shù): This word means "to end" or "to terminate". It's more appropriate for situations where something comes to a conclusion.
3. 完毕 (wán bì): This word also means "to finish" or "to complete", but it implies a more formal or official tone.
4. 结束 (jié shù): This word is similar to "结束" but can also mean "to stop" or "to cease".
The specific word you should use will depend on the context of your sentence.
For example:
* "I finished my homework." - 我完成了我的作业。 (Wǒ wán chéng le wǒ de zuò yè.)
* "The meeting is finished." - 会议结束了。 (Huì yì jié shù le.)
* "The project is finished." - 项目完成了。 (Xiàng mù wán chéng le.)
Remember that Chinese grammar is different from English grammar, so you may need to adjust the sentence structure accordingly.