任务二:根据短文内容,完成句型转换。
1. We have cleaned the community park for two hours every weekend.(对画线部分提问)
have you cleaned the community park every weekend?
2. Ms Li has volunteered in the community for five years.(对画线部分提问)
has Ms Li volunteered in the community?
3. The volunteer team has helped over 200 people in need so far.(改为否定句)
The volunteer team over 200 people in need so far.
4. Lily has sung old songs for the elderly in the community nursing home.(改为一般疑问句并作肯定回答)
— Lily old songs for the elderly in the community nursing home?
—Yes, she .
5. I have been a team member for one year.(用 since 改写,句意不变)
I have been a team member the summer vacation of 2025.

1. How long
2. How long
3. hasn't helped
4. Has; sung; has
5. since

任务三:根据短文总结语法规律,用 since 或 for 填空。
现在完成时与 since 或 for 搭配,用来表示从过去持续到现在的动作或状态,强调动作的"持续性"。

1. She has been a volunteer last August.
2. He has volunteered here a long time.
3. I have been a member of the Red Cross six years.
4. They have worked here 2023.
5. We have known each other we were children.

1. since
2. for
3. for
4. since
5. since