to be under necessity or obligation toyou shall do as I say
you shall do as I say
have (to), must, need, ought (to), should
will
before the 12th century
英语同义词词典收录了63618条英语词条,基本涵盖了全部常用同义词或反义词的辨析及翻译,是英语学习的有利工具。