所有非谓语的否定都是在最前面加not

to do (不定式）—— no to do
doing (ing) ——- not doing
done ——- not done

经典例题 :::info __finished his work, he had to stay at home at the weekend.

A.Having not been
B. Being not
C.Not having
D.Having not

分析都属于非谓语动词的-ing 形式，但是 not 位置放的不同
按照非谓语的否定not 应放在非谓语动词的最前面 Not having :::