按要求做题。 1. She has been swimming for 2 ho
题型：句型转换
问题：
按要求做题。
1. She has been swimming for 2 hours. (改为同义句)
She has been swimming 2 hour____.
2. My little sister is always behind me. (改为同义句)
My little sister me .
3. Tom played football for an hour. (改为现在完成进行时)
Tom football for an hour.