buy,do,have,see,open,air,ask,put,go,be的过去式和过去分词
问题描述:
buy,do,have,see,open,air,ask,put,go,be的过去式和过去分词
答
buy bought bought
do did done
have had had
see saw seen
open opened opened
air aired aired
ask asked asked
put put put
go went gone
be was/were been