根据句子意思,用括号内所给词的正确形式填空.
1.Who gets up _______（early）,Tim or Tom?
2.Teacher asked him ______（do）some exercise after school.
3.May swims as _______（slow）as his brother.
4._______ Nancy sing ______（well）than Helen?
5.My father often goes _______（walk）after supper.