有许多不规则动词（大约250个）在组成过去时和过去分词时使人们感到困惑。
这里有一个不规则动词的样本。
| 现在时 | 过去式 | 过去分词 |
|---|---|---|
| drink | drank | drunk |
| be | was, were | been |
| eat | ate | eaten |
| see | saw | seen |
| swim | swam | swum |
生词表:
| 现在时 | 过去式 | 过去分词 |
|---|---|---|
| drink | drank | drunk |
| be | was, were | been |
| eat | ate | eaten |
| see | saw | seen |
| swim | swam | swum |
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