[Constitution Day]

I notice them all the time.

When I was in high school, I used to help my mom proofread papers (she was a teacher then).
To this day, grammatical and spelling errors just seem to leap off the page at me.

[Tax-chick]

grammatical and spelling errors just seem to leap off the page at me.

In color.

[Old Professer]

I once was cautioned not to use used to to replace once.