在做主被动置换题目时遇到的问题,想请问各位:
1.Does Prof.Shapiro teach that course ? No, he doesn't
→(被动) [Is] that courses be taught by Prof. Shapiro? No, it [is] not taught
by him.
书上没有提及be V 与助动词的置换,查过网络好像是因为一般V在疑问句or否定句下无法
表达,需要助动词的帮助,想请问be V与do/does是可以随意置换吗? 还是有主被动的限制
? 从这边看好像是被动用be V, 主动用do/does
2.When was ink first used? No one knows when [ink was] first used.
[]中可以顺序可以对换吗? →No one knows when [was ink] first used.