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La doccia si deve lasciare pulita.

La doccia si deve lasciare pulita.
The shower must be left clean.
From Lesson 276:Passive 'si' with modal verbs (si deve fare)·Italian

Questions & Answers about La doccia si deve lasciare pulita.

Why is it si deve lasciare instead of just si lascia?
This sentence uses a modal verb (dovere, meaning must or have to) together with the si passivante. Instead of just saying the shower is left (la doccia si lascia), the modal adds the meaning of necessity: the shower must be left (la doccia si deve lasciare). The modal verb takes the active conjugation, followed by the infinitive of the main verb.
Why is the verb deve in the singular?
In the si passivante structure, the object of the action becomes the grammatical subject. Since La doccia is a singular noun, the modal verb deve must be conjugated in the third-person singular to match it. The person actually doing the leaving is unspecified.
Why does the word for clean, pulita, end in -a?
Because La doccia is the grammatical subject of this passive sentence. The adjective pulita describes the shower, so it must agree in gender and number (feminine singular) with La doccia, even though the action is being performed by an unspecified person.
Could I attach the si to the end of the infinitive instead?
Yes! With modal verbs, you have two choices for where to put the si. You can put it before the conjugated modal verb (La doccia si deve lasciare pulita) or attach it to the end of the infinitive by dropping its final -e (La doccia deve lasciarsi pulita). Both mean exactly the same thing.

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