Final answer:
The verb 'abre' is conjugated correctly in the sentence 'Ud. abre la puerta cada mañana'
Step-by-step explanation:
The verb 'abre' in the sentence 'Ud. abre la puerta cada mañana' is conjugated correctly. 'Abre' is the third person singular form of the verb 'abrir' (to open) in the present tense. It agrees with the subject 'Ud.' (usted - formal 'you').
Here are the conjugations of 'abrir' in the present tense:
- Yo abro (I open)
- Tú abres (You open)
- Él/Ella/Ud. abre (He/She/You open)
- Nosotros/as abrimos (We open)
- Ellos/Ellas/Uds. abren (They/You all open)
In this case, since the subject is 'Ud.', which is singular and third person, the correct conjugation is 'abre'.
Learn more about Spanish verb conjugation