knowing nothing to do,she ask the teacher for help.
the building under construction is a hospital.
he started to reading newspapers after turning off TV.
saw form the out space, the earth is blue
the coat hung on the wall is a birthday present from my sister.
1. cleaning改为clean 因为help(to)do
2. locking改为lock因为remember to do记得要做某事(没做);remember doing 记得做了某事(做了)
3. wants改为needs 因为want的主语是人
4. hurting改为to hurt 因为mean to do 计划做某事;mean doing(sth)意味着某事
5. saying改为to say 因为regret to do 常用来告诉某人坏消息
6. returning改为returned 因为前面的went并列
7. work改为working 独立主格,主语you和谓语work是主动的关系
8. giving改为given 独立主格,主语the bus 和谓语give是被动关系
9. going 改为went
10. being改为were