The second is related to the active clause "I could not draw this picture." Neither of the passive versions is particularly idiomatic, though.
– Dec 24 '13 at 15:23
I noticed in some grammar site that in active/passive voice conversion,modals are not changing.Hence I think first option seems to be correct.
– ArunDec 24 '13 at 16:11
The difference is the same as the difference between: "I am not able to draw the picture" and "I was not able to draw the picture"
– JimDec 24 '13 at 16:31
1 Answers1
2
The passive voice does not change the tense. Therefore, option 1 is correct.