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不定式的形式中进行式是哪两个?一个是tobedoing,另一个是tohavebeingdoing还是tohavebeendoing?新东方的网络课程上写的是tohavebeingdoing望高手作答,谢

题目详情
不定式的形式中进行式是哪两个?
一个是to be doing,另一个是to have being doing还是to have been doing?
新东方的网络课程上写的是to have being doing
望高手作答,谢
▼优质解答
答案和解析
to have been doing
没有to have being doing的形式,应该是网络课程的资料有误