how to make dress与how dress be made

Last summer I took a course on_______．

A．how to make dress

B．how dress be made

C．how to be made dress

D.how dress to be made

如果我要改成被动句，应该如何改B选项？

本句的不定式无法改为被动形式。若改的话，就把不定式变成从句（on 的宾语从句）：

Last summer I took a course on how dress should be made.

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

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mikee 1秒前

Last summer I took a course on how dressses are made.

我认为先前专家用不可数的dress及用should都不妥