subject in the active sentence is the agent or doer of an action,and in the passive the recipient of the action. In this lecture we discussed the use of active voice and passive voice and some special points that we should pay much attention to verb voices. 三、非谓语动词Non-finite forms) English verb have three non-finite forms: infinitive,participles and gerund.In this lecture we talked about the uses of different non-finite forms or types,their tense and their voices,some non-finite patterns and exceptions.4 • subject in the active sentence is the agent or doer of an action, and in the passive the recipient of the action. • In this lecture we discussed the use of active voice and passive voice and some special points that we should pay much attention to verb voices. 三、非谓语动词(Non-finite forms) • English verb have three non-finite forms: infinitive, participles and gerund. In this lecture we talked about the uses of different non-finite forms or types, their tense and their voices, some non-finite patterns and exceptions