In English, a command — also called the imperative — is formed using the base form of the verb with no subject. This exercise practices recognizing and producing the imperative by connecting it to the present perfect: you see the completed action, then supply the command form of the same verb. This is exercise 1 of 2 in this series.
Grammar review
A command (also called an imperative) tells someone to do something. It is one of the simplest and most useful structures in English. To form a command, use the base form of the verb — no subject, no conjugation needed.
Sit down. Close the door. Write your name here.
The three main types:
1. Positive commands — tell someone to do something. Turn left at the corner. / Please wait here.
2. Negative commands — tell someone not to do something. Use Don't + base verb. Don't touch that. / Don't be late.
3. Polite commands — soften a command with please, could you, or would you mind. Please pass the salt. / Could you open the window?
Common situations where we use commands:
Giving directions (Turn left), instructions (Mix the flour and sugar), warnings (Watch out!), and requests (Please call me later).
Good to know: The subject of a command is always you — it just isn't said out loud. This is called the understood you. So "Sit down" really means "You, sit down."