Change the verbs from Active into Passive. 1. They show American films every Sunday on TV.
2. He shows me his stamps each time when I come to his place.
3. They use disks for storing information.
4. They discover new planets every day.
5. They speak Spanish in Peru.

1. American films are shown on TV every Sunday.
To change the sentence from active to passive, we need to make the object of the active sentence the subject of the passive sentence. The verb "show" is changed to its passive form "are shown", and the subject "They" is removed.

2. I am shown his stamps each time when I come to his place by him.
In this sentence, we need to change the object of the active sentence ("his stamps") to the subject of the passive sentence. The verb "show" is changed to its passive form "am shown", and the subject "He" is replaced with "by him" at the end of the sentence to indicate the doer of the action.

3. Disks are used for storing information.
Again, the object of the active sentence ("disks") becomes the subject of the passive sentence. The verb "use" is changed to its passive form "are used", and the subject "They" is removed.

4. New planets are discovered every day.
The sentence is changed from active to passive by making the object of the active sentence ("new planets") the subject of the passive sentence. The verb "discover" is changed to its passive form "are discovered", and the subject "They" is removed.

5. Spanish is spoken in Peru.
To change the sentence from active to passive, we need to make the object of the active sentence ("Spanish") the subject of the passive sentence. The verb "speak" is changed to its passive form "is spoken", and the subject "They" is removed.

In summary, to change a sentence from active to passive, we need to:
1. Make the object of the active sentence the subject of the passive sentence
2. Change the verb to its passive form
3. Remove the subject (or replace it with "by" + the doer of the action, if necessary)
These changes allow us to convert the active sentence into the passive voice while maintaining the same meaning.