要用英语写作业，你可以遵循以下步骤和表达：

开始写作业

You can start your homework by saying, "I am going to start my homework."

描述作业内容

If you need to talk about the specific tasks, you can say, "My homework today includes reading chapters 1 and 2, and writing a summary of the text."

表达正在进行的动作

If you are currently working on your homework, you can say, "I am doing my homework right now."

询问他人是否在做作业

If you want to ask someone else if they are doing their homework, you can ask, "Are you doing your homework？"

结束写作业

When you have finished your homework, you can say, "I have finished my homework."

示例句子

开始写作业：

"I am going to start my homework."

描述作业内容：

"My homework today includes reading chapters 1 and 2, and writing a summary of the text."

表达正在进行的动作：

"I am doing my homework right now."

询问他人是否在做作业：

"Are you doing your homework？"

结束写作业：

"I have finished my homework."

这些表达可以帮助你用英语清晰地描述写作业的过程。