He does

[patryn]

Hello all,

couldn't find a previous topic about this on other sites and this one so consider this:

"Who teaches John piano on Sundays?"
"Michael does."

This sounds correct and all, but why does it sound incorrect when I try and use the following:
"Who teaches John piano on Sundays?"
"Michael teaches."

[Alan]

'Teach' is a transitive verb and therefore requires an object (Michael teaches HIM, etc.)

However, when a verb is replaced by 'do' as a pro-form, objects and complements are not included.