及物动词有被动语态,不及物动词没有(及物动词就是后面直接加宾语,不及物动词后部不直接加宾语)若及物动词没宾语,用被动e.gl am invited(及物v,没宾语)to attend the meeting若不及物动词后又介词,可以用被动e.gThe river is risen(不及物v,后又介词up) up
被动语态的变法:一般现在时:am,is,are+done一般过去时:was,were+done一般将来时:will be done过去将来时:would be done现在进行时:am is are+being done过去进行时:was were+being done现在完成时:have been done过去完成时:had