one of the things

English as a Second Language English Vocabulary, Grammar and Idioms
1

[color=indigo]1-I have not done one of the things I had to do.

Can’t this sentence mean two things:
[color=red]a-I haven’t even done one of the things I had to do.
[color=blue]b-I have done all the things I had to do but one.

Gratefully,
Navi.

2

Yes. In spoken English the word “one” would be stressed for meaning (a).