Can any kind person proof this please

Change the following from the active into the passive(the first one has been done as an example)

A crocodile eats Henry – Henry is eaten by a crocodile.
A crocodile is eating Henry – Henry is being eaten by the crocodile.
A crocodile has eaten Henry – Henry has been eaten by a crocodile.
A crocodile ate Henry – Henry was eaten by a crocodile.
A crocodile was eating Henry – Henry was being eaten by a crocodile.
A crocodile had eaten Henry – Henry had been eaten by a crocodile.
A crocodile will eat Henry – Henry will be eaten by a crocodile.
A crocodile is going to eat Henry – Henry is going to be eaten by a crocodile.
A crocodile will have eaten Henry – Henry will have been eaten.
They have buried Henry (note that the agent isn’t important) – Henry has been buried.

All the changes are correct.

To change the sentences from active voice to passive voice, follow these steps:

Step 1: Identify the subject of the active sentence.
The subject is the doer of the action in the sentence. In this case, the subject is "A crocodile."

Step 2: Identify the object of the active sentence.
The object is the receiver of the action in the sentence. In this case, the object is "Henry."

Step 3: Rearrange the sentence and use the correct form of the auxiliary verb "to be."
The subject of the active sentence becomes the object of the passive sentence, and the object becomes the subject. Use the appropriate form of "to be" as the auxiliary verb in the passive voice.

For example:
Active: A crocodile eats Henry.
Passive: Henry is eaten by a crocodile.

Step 4: Add the past participle to the auxiliary verb.
The past participle is the third form of the verb, usually ending in "-ed" or an irregular form. Attach it to the auxiliary verb "to be."

Here are the changes for each sentence provided:

1. A crocodile is eating Henry.
Passive: Henry is being eaten by the crocodile.

2. A crocodile has eaten Henry.
Passive: Henry has been eaten by a crocodile.

3. A crocodile ate Henry.
Passive: Henry was eaten by a crocodile.

4. A crocodile was eating Henry.
Passive: Henry was being eaten by a crocodile.

5. A crocodile had eaten Henry.
Passive: Henry had been eaten by a crocodile.

6. A crocodile will eat Henry.
Passive: Henry will be eaten by a crocodile.

7. A crocodile is going to eat Henry.
Passive: Henry is going to be eaten by a crocodile.

8. A crocodile will have eaten Henry.
Passive: Henry will have been eaten.

9. They have buried Henry (note that the agent isn’t important).
Passive: Henry has been buried.