1、answer的过去式是answered。

2、answer：答复; 回答; (试题、练习等的) 答案，正确答案; (问题的) 解决办法，答案;适合; 符合; 比得上; 相配。

3、[例句]：I knew Ben was lying when he answered me.我知道本回答我时在撒谎。