Imperative mood
The imperative mood is used for commands or instructions. It is not always considered a verbal mood per se. It is formed by using the verb in its simplest, unconjugated form: "Listen! Sit! Eat!" The imperative mood in English occurs only in the second person, and the subject ("you") is generally not expressly stated, because it is implied. When the speaker gives a command regarding anyone else, it is still directed at the second person as though it were a request for permission, although it may be a rhetorical statement.

1. Let me do the talking.
2. Let us build a bridge.
3. Give him an allowance.
4. Let sleeping dogs lie.