有理由

• justfication
• have cause for
• be justified in

例句

1. 那并不表明你有理由这样做。
   That does not warrant you in doing so.
2. 没有理由这样粗鲁。
   There was no occasion to be so rude.
3. 你没有理由抱怨。
   You have no cause for complaint/no cause to complain.
4. 我认为没有理由把公司划分为小单位。
   I can see no justification for dividing the company into smaller units.
5. 只要双方都有充分的善意，这种纠纷是没有理由解决不了的。
   Given sufficient goodwill on both sides, there's no reason why this dispute shouldn't be resolved.