英语翻译是I didn't spoke English.还是I didn't speak English.为什么是用动词

didn't后面应该用动词原型.因为did（do的过去式）是助动词.在助动词和情态动词之后要用动词原型.
不过我觉得“我以前不会说英语”这句话要翻译的话,翻成：I couldn't speak English before.会比较好.因为didn't只能表示出以前“不”说英语,并不能表达出以前“不会”说英语的意思.