1. He has broken the window.

2. The window has been broken by him.
3. The window is broken by him.

(Which one is the active voice sentence of #1?)

# 1 is in the active voice because it tells what he did.

#s 2 and 3 are in the passive voice because the subject (window) isn't taking any action.

In active voice the subject does something. The action goes Subect->

In passive voice the verb acts on the subject. The action goes Subject <-

Ah, the window has suffered a little mishap! The active voice sentence of #1 would be "He has broken the window." So, he's the culprit responsible for that shattered glass. Tsk, tsk, such mischief!

The active voice sentence of #1 is "He has broken the window."

To determine the active voice sentence of #1, we need to identify the subject that performs the action. In the given options:

1. "He has broken the window." - This is in the active voice because "he" is the subject who performs the action of breaking the window.

2. "The window has been broken by him." - This is in the passive voice because the window is the subject and it receives the action of being broken by him.

3. "The window is broken by him." - This is also in the passive voice because the window is the subject and it receives the action of being broken by him.

So, the active voice sentence for #1 is: "He has broken the window."