在句子“仔细听”中，动词“Listen”是命令式。

In the sentence 'Listen carefully,' the verb '___Listen' is in the imperative mood.

老师在黑板上写下“安静！”来举例说明命令式。

The teacher wrote '___Be quiet!' on the board to illustrate the imperative.

英语中一个常见的否定命令式是“Do not forget”或“Don't forget”。

A common negative imperative in English is '___Do not forget' or '___Don't forget.'