Teacher (paying a visit): Are your father and mother in, Morton?
Morton: They was in, but they is out.
Teacher: Why, Morton! They was in!' They is out!' Where is your grammar?
Morton: She's upstairs taking her nap.
to be in = to be at home
to be out = not to be at home
Мортон смешивает слова grammar - грамматика и grandma-grandmother - бабушка
to take one's nap = to sleep
LI 3.9.25