1. I do my homework every day.
2. I did my homework yesterday night.
3. I will do my homework tomorrow night.
4. I have finished my homework now.
5. I am doing my homework now.
6. I was doing my homework at 8pm yesterday night.
一般现在
I (always) eat breakfast.
一般过去
I ate breakfast this morning 或 two hours ago.
现在进行
I am eating breakfast now.
过去进行
I was eating breakfast when the phone rang.
现在完成
I have (already) eaten breakfast.
一般将来
I will eat breakfast (tomorrow).
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