Te + shimau

[bluefish]

I am trying to say "I regrettably did no homework at all" and I was going to put "Watashi wa zenzen shukudai o shite shimaimashita." but that seems to be an affirmative sentence, and whenever I see "zenzen" my mind is trained to want a negative sentence. So is it "Watashi wa zenzen shukudai o shite shimaimasen deshita"? That would seem to negate your regret, though. But the first one seems to imply that you did do your homework, since there is no negation. Help?

[richvh]

Hm, I'm pretty sure you need to attach しまう to a positive verb (as you have done, so 宿題をしてしまう means something like "unintentionally do homework".) How about:
私は何もの宿題をするのを忘れてしまいました。
わたしはなにものしゅくだいをするのをわすれてしまいました。

[Yudan Taiteki]

宿題をしてしまった can also mean "completely did the homework"; "unfortunately" and "contrary to expectation" are only two possible meanings.

[hiwa]

"I regrettably did no homework at all"
「sumimasen. shukudai ga zenzen dekimasen desita.」
dekimasen desita .... could not do
'did no' could have slight tinge of arrogance or laziness/slack

[bluefish]

Thanks for your replies. Hmm...I didn't exactly forget to do it because I knew I had to do it. I guess I want to express regret that I could have got it out of the way, but I didn't. And it's not that I couldn't do it, because I had plenty of time. And I suppose I would indeed be trying to convey that I was being quite lazy.

edit -actually it's more like projects than homework. I am talking about what I did during spring break (last week) and I did not work on the projects. it's not that I am telling my japanese teacher I didn't do my homework, the projects were not even for her class.

[Sunken]

Perhaps you can use a construction like ー損なってしまった　or ー忘れてしまった?