roniy said:should that be
"she felt it is her duty ....."
"she felt it which is her duty ...."
However, you can't use "She felt it her duty" on its own, you would have to use "She felt [that] it was her duty."
Le Pamplemousse said:I disagree, and agree with koliver. Albeit a little outdated, another way of expressing this is "She felt it to be her duty." I have heard many people use sentences like this omitting the "to be", and it is actually pretty close to what happens in Latin. Another example:
"I thought it weird that she was there."
While I might never use a sentence like this in conversation, I think it's acceptable.