不需要公式,超简单,基本上是照抄.给你例子,要公式自己归纳去.
一般现在时
He draws a picture on the wall.
--> A picture is drawn (by him) on the wall.
一般过去时
He drew a picture on the wall.
--> A picture was drawn (by him) on the wall.
现在进行时
He is drawing a picture on the wall.
--> A picture is being drawn (by him) on the wall.
过去进行时
He was drawing a picture on the wall.
--> A picture was being drawn (by him) on the wall.
一般将来时
He will/is going to draw a picture on the wall.
--> A picture will/is going to be drawn (by him) on the wall.
过去将来时
He would/was going to draw a picture on the wall.
--> A picture would/was going to be drawn (by him) on the wall.
现在完成时
He has drawn a picture on the wall.
--> A picture has been drawn (by him) on the wall.
过去完成时
He had drawn a picture on the wall.
--> A picture had been drawn (by him) on the wall.
现在完成进行时（这个比较特殊,它没有被动态,非要变被动的话,就是这样：）
He has been drawing a picture on the wall.
--> A picture has been drawn (by him) on the wall.
过去完成进行时（同上）
He had been drawing a picture on the wall.
--> A picture had been drawn (by him) on the wall.
一般将来进行时（同上）
He will/is going to be drawing a picture on the wall.
--> A picture will/is going to be drawn (by him) on the wall.
过去将来进行时（同上）
He would/was going to be drawing a picture on the wall.
--> A picture would/was going to be drawn (by him) on the wall.
将来完成时
He will have drawn a picture on the wall.
--> A picture will have been drawn (by him) on the wall.
过去将来完成时
He would have drawn a picture on the wall.
--> A picture would have been drawn (by him) on the wall.
就这些.将来完成进行时、过去将来完成进行时理论上都没有被动态