Why do native English speakers use passive voice sentences like: "I'm done, I'm finished" instead of " I've done/I did, I've finished/I finished"?
Please note that "I'm done" and "I'm finished" are not in the passive voice.
I thought they [STRIKE]are[/STRIKE] were something like this: "[strike]I'm[/strike] I was/I have been fired by my boss". They are very similar to the passive voice, at least to me. ;-)
Here's a fun little way to check if something is in the passive. Ask yourself "Can I add "by zombies" after it to make a grammatical sentence?"
I was shot.
Can I say "I was shot by zombies"? Yes, I can, so it's passive.
Their aunt was sold rotten fish.
Can I say "Their aunt was sold rotten fish by zombies"? Yes, I can, so it's passive.
I'm done.
Can I say "I'm done by zombies"? No, that doesn't make sense so "I'm done" isn't passive.
What tense are "I'm done" and "I'm finished"?
This zombie thing, were you taught this in the school?;-)
This zombie thing -- were you taught it in school?
When I was going to school zombies used to help me study. But when I told them I didn't believe in zombies they got mad at me and wouldn't help me anymore.
;-)
I like your idea of "Is it a verb?", emsr2d2. I used to have sleepless nights because of "The world's population is growing". It doesn't look like the present continuous to me. I'm not sure if it's just a present participle adjective added to the main verb be. What can you say about this construction?