the passive voice

SPAN></SPAN></SPAN>Simple present :</SPAN>
</SPAN></SPAN></SPAN>-Ahmed draws nice pictures</SPAN>
</SPAN></SPAN></SPAN>=> Nice pictures are drawn by Ahmed</SPAN></SPAN>
</SPAN>
</SPAN></SPAN></SPAN>Present continious :</SPAN></SPAN>
</SPAN>
</SPAN></SPAN></SPAN>-They are painting the house white</SPAN></SPAN>
</SPAN>
</SPAN></SPAN></SPAN>=> The house is being painted white</SPAN></SPAN>
</SPAN>
Simple past :</SPAN>
-She wrote a letter</SPAN>
=> A letter was written</SPAN>
</SPAN>
Past continious :</SPAN>
-They were visiting the zoo when the accident happened</SPAN>
=> </SPAN>the zoo was being visited when the accident happened</SPAN>


</SPAN>
Present perfect :</SPAN>
- </SPAN></SPAN></SPAN>some one has just broken the window</SPAN></SPAN>
</SPAN></SPAN></SPAN>The window has just been broken</SPAN></SPAN>
</SPAN>
PASSIVE WITH MODAL AUXILARIES</SPAN>
</SPAN>
[can, may, must, have to, had to, could, would, ought to] + be+ past participle</SPAN>
</SPAN>
Ex: people must respect the law</SPAN>
</SPAN></SPAN></SPAN>The law must be respected</SPAN></SPAN>
</SPAN>
</SPAN>
[Shall, will, going to ]+ be+ verb</SPAN>
</SPAN>
Ex : She is going to celebrate her marriage</SPAN>
=> The marriage is going to be celebrated</SPAN>