Not being punctual makes him unreliable. 不准时使人觉得他不可靠。
Not being tall is not a serious disadvantage in life.
He said he so much regretted not being able to swim.
Our problem is not having sufficient raw material.
Don't be angry with me for not having written. 我没给你写信请別生我的气。
Excuse me not having answered your letter before. 没有回信请原谅。
I apologize for not having kept my promise. 我没遵守诺言向你表示歉意。
He doesn't like not being taken seriously.
As far as he ， s concerned ， it's not doing something wrong that matters ， but not being caught doing something wrong.
I 'm surprised at your not having noticed.
I understand your not wanting to discuss the matter.
The trouble was their not being able to agree among themselves.
Jenny ，s not having been trained as a dancer is her one regret.