一个是不定式（to do），一个是动词原形（do），加了never 句法功能不变。Never To do 除了谓语，其他成分都可以，如，Never to do homework is my dream. 做主语. Never do做谓语，He never do homework.

never用作副词表示永不，绝不等含义；一般位于 系动词 及助动词之后, 实义动词 之前; 可用于句首以加强语气，其后的句子要主谓倒装。 Neighbors are said never to agree. 据说,邻居们永远不会同意。 例：I have never lost the weight I put on in my teens. 我在十几岁时增加的体重从没减下去过。 例：Never had he been so free of worry. 他从没这样无忧无虑过。 例：That was a mistake. We'll never do it again. 那是个错误，我们永远不会再犯了。 例：I would never do anything to …

I never do what is against the law. I never did anything bad to you. I have never done these types of handicrafts.

I never do that means the speaker doesn’t do some action, and won’t do it now or in the future (I will never do that). I’ll use an example with a chef for both. Interviewer: Do you burn food? Chef: No, I never do that. I never did that means the speaker hasn’t done some action that …

I did never sounds unnatural in the English language. I never did is more natural, but it's an incomplete statement. For example, you can say, "I never did that." or "I never did my homework." Whatever you 'never did' needs to be filled in with something! Hope this helps!

never to do ... 句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思，结构︰…never＋to-不定词…说明︰此句型意为“不会再有…的结果”。 He went on a journey when he was 18 years old, never to e back. 他十八岁时出外旅行，一直没有回来。

2015年7月10日 · Never do sth.，不需要加不定式to do 意思是：不要为他人的荒谬言论所欺骗 确保质量，欢迎采纳

2020年12月13日 · 通常来说，是never do，比如：Never do things bad. 但若有分词作 独立结构 或有关上下文的其他场合，不能说never doing错，比如: I was never doing homework at home. 我以前从不在家做作业.

1.never do 一般现在时态用法,表示陈述现在的事实,比如 I NEVER SEE THE MAN.我从来就没有看过这个人.表示你当前的状况,陈述你的事实而已.2.never did.是过去式了.表示放生在过去.3.has/have never done.现在完成表...

Never ever tell anyone your password. 不要把你的密码告诉任何人。 I never knew (= didn't know until now) you had a twin sister. 我一点都不知道你还有个双胞胎姐姐。 (especially British English)Someone might find out, and that would never do (= that is not acceptable) . 也许有人会发现，那是绝对不行的。 He never so much as smiled (= did not smile even once) . 他从未笑过。