词形变换

1．serious(比较级)________

2．possible(反义词)________

3．attack(名词)________

4．make(过去式)________

5．bleed(过去式)________

6．enemy(复数)________

7．obvious(副词)________

8．run(现在分词)________

9．breath(动词)________

10．heavy(副词)________