Sed it last vs last used it

I'm the one that last used it.

I'm pretty sure you can say both.

can anyone else let me know?

thanks

Yes, both are OK. I would use "who" rather than "that"

I am the one who last used it.

AlpheccaStarsYes, both are OK. I would use "who" rather than "that"
I am the one who last used it.

I'm the one who used it last doesn't sound right to me.

Is it often used by native speakers?

I would be more likely to say, "I'm the one who used it last" than "I'm the one who last used it." "I'm the last one who used it" is also posssible.

Thanks, Khoff.