reason的形容词形式是：reasonable ；
reasonable：
adj.公平的;合理的;有理由的;明智的;可以接受的;合乎情理的;公道的;不太贵的。
比较级： more reasonable.
最高级： most reasonable.
派生词： reasonableness n.
扩展资料
You must submit your claim within a reasonable time.
你必须在适当的时间内提出要求。
It seems only reasonable to ask students to buy a dictionary.
要学生买一本词典，好像也没什么不合情理。
I made them a reasonable offer but they turned it down flat.
我向他们提出一个合理建议，但是他们断然拒绝了。
Public spending must be kept within reasonable bounds.
公共开支必须控制在合理的范围内。
Theres a reasonable prospect that his debts will be paid.
有理由相信他会偿还债务的。
