it 可以代指动词吗?比如说,yesterday,i did my homework,and i spend three

it 可以代指动词吗?比如说,yesterday,i did my homework,and i spend three I did my homework yesterday 划线did my homework I did my homework yesterday.中文翻译 I did my homework yesterday.(对l I did my homework yesterday.改为疑问句 I did my homework yesterday evening急 I did my homework yesterday对did my homewor Yesterday morning I stayed at home and did my homework .In t I did my homework I did my homework three hours before 改错 I did not my homework yesterday修改病句 I did my homework yesterday evening.改为否定句