That would be the imperative mood, just as in English.

By conjugating the verb in the imperative (only possible with tu, vous and nous, of course).

To say “Do the dishes”, you would therefore say:

Faites la vaisselle.

or

Fais la vaisselle.

French has an imperative, it works the same as the English one with 3 forms in the present tense instead of 1 for English:

• fais la vaisselle (TOI/YOU => 2sg)
• faisons la vaisselle (NOUS/WE => 1pl)
• faites la vaisselle (VOUS/YOU => 2pl)

Actually, these forms have a subject but it is not expressed outside the verb. On the other hand, infinitives do not have subjects in French or English:

• to do the dishes is boring
• faire la vaisselle n’est pas amusant