时态\语态 主动 被动
一般式 to do to be done
进行式 to be doing
完成式 to have done to have been done
完成进行式 to have been doing
1.现在时：一般现在时表示的动词，有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。
He seems to know this.
I hope to see you again. = I hope that I'll see you again. 我希望再见到你。
2.完成时：表示的动作发生在谓语动词表示的动作之前。
I'm sorry to have given you so much trouble.
He seems to have caught a cold.
3.进行时： 表示动作正在进行，与谓语动词表示的动作同时发生。
He seems to be eating something.
4.完成进行时：
She is known to have been wreaking on the problem for many years.
不定式时态和语态【春喜外语】供稿！春喜外语，学英语告别复读模式，与真人外教一对一面对面交谈，不管帅哥还是美女都任你选择。在线英语培训，只要有网络就可以轻松进入学习状态，老师、上课时间、地点你说了算。5年时间12000名学员的共同选择，欲了解更多详情，欢迎咨询在线客服！
此文章首发于春喜外语官网
