下列单词的过去式及规律
①put________ cut_______ hit_______ read_______ let_______
beat_______ hurt_______ cost_______ 规律___________________
②keep_______ sleep_______ sweep_______ 规律_________________
③teach_______ catch_______ 规律________________
④bring_______ buy_______ think_______ 规律__________________
⑤begin_______ drink_______ ring_______ sing_______ swim_______ sit_______ 规律_______________⑥lend______ send_______ spend_______ build_______ 规律______________
⑦sell_______ tell_______ 规律_______________
⑧say_______ pay_______ 规律_______________
⑨meet_______ feed_______ 规律_______________
⑩grow_______ know_______ throw_______ fly_______
规律_______________ 最好清晰一些 准确一些