1. 什么是时态？
英语中的时态是表明在不同的时间内所发生的动作或者存在的状态，英语总共有16种时态。
2. 汉语和英语时态的区别
1. 我打扫房间。
I clean the room.
2. 我在打扫房间。
I am cleaning the room.
3. 我已经打扫房间了。
I have cleaned the room.
4. 我还在打扫房间。
I have been cleaning the room.
英语是靠谓语的变形来说明时态的。
3. 时态的基本用法
1. 我每天晚上做作业。
I do my homework.
2. 我在做作业。
I am doing my homework.
3. 我已经做好作业了。
I have done my homework.
4. 我还在做作业。
I have been doing my homework.
4. 用被动语态翻译下列句子
1. 我打扫房间。
The room is cleaned.
2. 我在打扫房间。
The room is being cleaned.
3. 我打扫了房间。
The room has been cleaned.
4. 我还在打扫房间。
The room has been being cleaned.
5. 理论基础
主动情况下的时态：
被动情况下的时态：
6. 练习题
6.1. 完成下列填空
1. We often hold a meeting in the morning. （举办）
2. It is eight o’clock. They are doing their homework. （做）
3. Kids eat a cake. （吃）
4. The cake has been eaten by those children. （已经吃光了）
5. Their mother has been doing the dishes. （还在洗）
6.2. 用否定形式翻译下列句子
1. 小明吃过饭了。
Ming has not had dinner.
2. 他经常周末打游戏。
He does not play games at the weekend.
3. 他爸爸还在看电视。
His father has not been watching TV.
4. 她妈妈正在洗碗。
Her mom is not doing the dishes.
7. 课后作业
7.1. 用 take 代表动词完成填空
7.2. 根据提示完成填空
1. I am playing games with my phone. （正在玩）
2. She doesn't run in the morning. （不跑步）
3. Mary and Jenny are watching TV. （正在看）
4. The water has been exhausted. （已经耗尽了）
5. His father has slept for 2 hours. （已经睡了）
6. It is 5 o’clock. The baby is sleeping. （睡觉）
7. The experiment has not been finshed. （还没完成）
8. The poor boy has been doing his homework. （还在做）
9. This beautiful lady has been marrried since 1997. （已经结婚）
10. I live in Guangdong. （住）
7.3. 完成下列句子翻译
1. 我经常在早上起床。
I often get up in the morning.
2. 10点了，Jack还在看电视。
It's 10 o'clock, and Jack has been watching TV.
3. 小红已经写了2个小时的作业了。
Hong has spent 2 hours doing her homework.
4. 小明一直在玩电脑游戏。
Ming has been playing PC games.
5. 他们的领导还没有结束会议。
Their leader has not concluded the meeting.
6. 我们的任务还没有完成。
Our task has not been finished.