beusedto,beusedtodoing

i used to be a conservative, now i'm a progressive
九年级英语全册 unit 4 i used to be afraid of the
i used to be afraid of the dark.
辨析used_to_do_be_used_to_doingbe_used_to_doppt
used to do use sth to do sth be used to doing be used to do st