一、动名词的形式

1.肯定式

2.否定式

（1）not doing

Not being punctual makes him unreliable.不准时使人觉得他不可靠。

（2）not having done

I’m surprised at your not having noticed.你竟未注意到我感到吃惊。

（3）one’s not doing

Jenny’s not having been trained as a dancer is her one regret.

杰妮没受过舞蹈的专业训练是她感到遗憾的事。