1、即使
... even though 即使，纵然，尽管，虽然，甚至 be it that 假使；即使 take care of 照顾；注意；抚养 ...
2、即便
... in debt to sb．欠某人的债 be it that即便 assure sb．of sth．委托某人某事 ...
3、假使
... even though 即使，纵然，尽管，虽然，甚至 be it that 假使；即使 take care of 照顾；注意；抚养 ...
4、纵然
... take achance犯险，谋利 be it that纵然 cope with(乐成地)应付，(妥帖地)措置惩罚 ...