Question 1

Why does it say diseñada ending in -a instead of diseñado?

Accepted Answer

In the analytical passive voice (ser + past participle), the past participle acts like an adjective and must agree with the subject in both gender and number. Since the subject, La campana (the bell), is feminine and singular, the participle becomes diseñada.

Question 2

Why do we use fue (ser) here instead of estuvo (estar)?

Accepted Answer

We use fue because this sentence describes an action happening (the act of being designed). If we used a form of estar (like estaba diseñada), it would describe the resulting state of the bell, not the action. The structure ser + participle + por always focuses on the event and the agent performing it.

Question 3

Why is it por el arquitecto and not para el arquitecto?

Accepted Answer

In the passive voice, por is used to introduce the agent—the person or thing actually performing the action. If you used para el arquitecto, it would change the meaning entirely, stating that the bell was designed for the architect (as a gift or recipient), rather than by them.

Question 4

Could we use the se passive here instead, like Se diseñó la campana enorme?

Accepted Answer

Not in this exact sentence, because you are specifically naming the person who did the action (por el arquitecto). The se passive is used when the agent is unknown or irrelevant. Since we know the architect did it, we have to use either the analytical passive (fue diseñada) or simply switch to the active voice (El arquitecto diseñó la campana enorme).

La campana enorme fue diseñada por el arquitecto.

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