1,suddenly she saw a thief=suddenly a thief (was )(seen )(by ) (her)
2,John was usually very busy before ,but now he isn't so busy
=John ( used )( to ) be busy before ,but now he isn't so busy
1,suddenly she saw a thief=suddenly a thief (was )(seen )(by ) (her)
2,John was usually very busy before ,but now he isn't so busy
=John ( used )( to ) be busy before ,but now he isn't so busy