“不学英语不行”用英语怎么说

It's not feasible not to learn English.
楼主问的问题关键在于怎么解释“不行”?你是想说学习英语很重要吗?还是有谁强迫你必须要学?怎么个不行?只说这么一句话很难找到合适的词.
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如果是行不通的话,我觉得可以这么说：
It's impossible not to learn English.
It's unpractical not to learn English.