Active/passive verbs form

* | Active / Passive Verb FormsSentences can be active or passive. Therefore, tenses also have "active forms" and "passive forms." You must learn to recognize the difference to successfully speakEnglish.Active Form In active sentences, the thing doing the action is the subject of the sentence and the thing receiving the action is the object. Most sentences are active.[Thing doing action] +[verb] + [thing receiving action]Examples:Passive Form In passive sentences, the thing receiving the action is the subject of the sentence and the thing doing the action is optionally included near theend of the sentence. You can use the passive form if you think that the thing receiving the action is more important or should be emphasized. You can also use the passive form if you do not know who isdoing the action or if you do not want to mention who is doing the action.[Thing receiving action] + [be] + [past participle of verb] + [by] + [thing doing action]Active / Passive Overview   | Active| Passive |
Simple Present | Once a week, Tom cleans the house. | Once a week, the house is cleaned by Tom. |
Present Continuous | Right now, Sarah is writing the letter. | Right now, the letteris being written by Sarah. |
Simple Past | Sam repaired the car. | The car was repaired by Sam. |
Past Continuous | The salesman was helping the customer when the thief came into the store. | Thecustomer was being helped by the salesman when the thief came into the store. |
Present Perfect | Many tourists have visited that castle. | That castle has been visited by many tourists. |Present Perfect Continuous | Recently, John has been doing the work. | Recently, the work has been being done by John. |
Past Perfect | George had repaired many cars before he received his mechanic'slicense. | Many cars had been repaired by George before he received his mechanic's license. |
Past Perfect Continuous | Chef Jones had been preparing the restaurant's fantastic dinners for two years...