having done 用于句首有哪些情况啊!

having done 用于句首有哪些情况啊! not having done 还是having not done? never having done还是having never done having done 用法（1）having done充当状语时,是否只用于时间状语从句 (2)having done做非谓语动词时是否表示在此动作在主句谓语动词之前发生 having done的用法 doing having done being done having been done 造句! having done和having been done怎么用 如题 not having done 和 having not done 的区别 having been done和having done的区别rt having done的句子是什么时态的,having done 咋用~ having done可否作宾语,如try having done sth 用having been done 造句 having been done的用法 having been done是什么时态? having done 与doing 区别 用after having done造句 being done,have been done和having done怎么分辨 having done 、done、 being done、 having being done 的区别与详细用法