1.首先需要说明be relax是不正确的一种用法。正确的用法应该是be relaxed,表示感到很轻松的,感觉很放松的;
2.be relaxed常常和介词about和at连用,表示对某事物感到轻松、放心、和惊讶等,这里的系动词be可以由其它的系动词代替;
3.加about的例句:You feel relaxed about the plan, don't you?你对计划感觉很放心,对不对?He seemed relaxed about his performance,他似乎对自己的表演很放松;
4.加at的例句:I am surprised at you,我对你的行为跟到惊讶;I was surprised at your tone,我对你的腔调吃惊不小。
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