The trouble was their not (being able to) agree among themselves,_英语解答

The trouble was their not (being able to) agree among themselves,为什么括号内不是 having been able

人气：244 ℃　时间：2020-01-27 02:38:54

解答

是描述一种事实那在什么情况下用having~~请举个例子吧。。现在完成时额..就想问用having错在哪里