ann didn't do her homework yesterday evening
is She a teacher?
how many envelopes did The woman buy yesterday?
when did Tom dust the table at home?
what did they buy?
is 改为was
does 改为did
has 改为have
finished 改为finish
apple改为apples
wasn't改为didn't
found改为find
jack后面加been
go改为went
do改为did
believe cost kinds didn't because
DA