+188.+ Perhaps one of the most frequent mistakes is the confusion in the
use of the past time form and the past participle. Remember that the
past time form is never used except in expressing past time; never use
it in forming a verb phrase. Take the verb _do_, for example--say, _He
did the work_, never, _He done the work_; but we should say, _He has
done the work_, never, _He has did the work_. _Say_ and _seen_ are
confused in the same manner. Watch this carefully.