Is it grammatical to omit the subject from "I did my work"? [duplicate]

Possible Duplicate:
Is it acceptable to begin a declarative sentence with “Am”?

Is it correct to start a sentence with did.

Did my work.

instead of

I did my work.

while answering my emails?

Solution 1:

You can do this if being informal, especially in spoken English. Example:

Janet: Hey, Mike, what did you do today?
Mike: Ah well, you know, the usual. Did the dishes, fed the dog. Nothing extraordinary.

But to be formally correct, you need to include the personal pronoun:

The usual. I did the dishes, then I fed the dog.

When answering an e-mail, I'd recommend sticking to the formal version, unless you're explicitly speaking douchebag.

Even if you get an informal e-mail from your superior, I would still recommend being at least grammatical in your reply. You don't necessarily have to be formal as if addressing the king, but you should still at least show your intelligence level by not breaking the basic grammar rules.

Solution 2:

Did this, Done that etc are usually used in notes and informal communication.