Genereal

http://www.englishpage.com/index.html
http://www.englishpage.com/verbpage/activepassive.html

Active / Passive Verb Forms
Sentences can be active or passive. Therefore, tenses also have "active forms" and "passive forms." You must learn to recognize the difference to successfully speak English.
Active Form
In active sentences, the thing doing the action is the subject of the sentenceand the thing receiving the action is the object. Most sentences are active.
[Thing doing action] + [verb] + [thing receiving action]
Examples:
[pic]
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 the end of the sentence. You can use the passive form if you think that the thingreceiving the action is more important or should be emphasized. You can also use the passive form if you do not know who is doing 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]
Examples:
[pic]
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 letter is 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 |The customer was being helped by the salesman when the |
| |came into the store. |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 receivedhis |Many cars had been repaired by George before he received |
| |mechanic's license. |his mechanic's license. |
|Past Perfect Continuous |Chef Jones had been preparing the restaurant's fantastic|The restaurant's fantastic dinners had been being prepared |
||dinners for two years before he moved to Paris. |by Chef Jones for two years before he moved to Paris. |
|Simple Future |Someone will finish the work by 5:00 PM. |The work will be finished by 5:00 PM. |
|will | ||
|Simple Future |Sally is going to make a beautiful dinner tonight. |A beautiful dinner is going to be made by Sally tonight. |
|be going to | | |
|Future Continuous |At 8:00 PM tonight, John will be washing the dishes. |At8:00 PM tonight, the dishes will be being washed by |
|will | |John. |
|Future Continuous |At 8:00 PM tonight, John is going to be washing the |At 8:00 PM tonight, the dishes are going to be being washed|
|be going to |dishes....