1 . The knife needs __________(edge), because it’s not sharp. (所给词的适当形式填空)

2 . I think it is your husband who is__________(blame) for the spoiled child. (所给词的适当形式填空)

3 . Don' t always blame your own failure on others. Sometimes you should remember yourself are_______ _______(blame).（用所给单词适当形式填空）