“Announce”是英语中常见的动词，表示“宣布、通告”。根据语境和使用方式，其形式多样，以下是常见用法总结：
| 形式 | 用法说明 | 示例 |
| announce | 基本形式，用于主动语态 | The company will announce a new product. |
| announced | 过去式，用于过去事件 | The news was announced yesterday. |
| announcing | 现在分词，用于进行时或动名词 | They are announcing the results now. |
| to announce | 不定式，用于目的或计划 | I need to announce my decision. |
| announcement | 名词形式，指公告或声明 | There is an official announcement. |
以上是“announce”的主要形式及其使用场景。正确使用这些形式有助于提高语言表达的准确性。
