I have sung opera before, but I have never danced to it.

In practice, you end with conjugations like these:

The only way to know how to conjugate “sing” is to memorize its special forms. Instead, “sing” has both a unique past tense and also a unique past participle form. You can’t use “singed” because that’s an incorrect form for this verb. “Sing,” however, is irregular, so the normal rules don’t work. To create both the simple past tense and past participle forms, you simply add “-ed,” or in this case only “-d” because the base form ends in e already. To conjugate “dance,” there’s no big surprise or trick you just use the same formula as with most other verbs. To show you what we mean, let’s “dance” and “sing!” This pair is a good example to see the differences: “dance” is a regular verb, but “sing” is an irregular verb. (Just a reminder: The past participle is the form used with the present perfect tense. Irregular verbs, however, use completely original words for their different verb forms when they’re the main verb of a sentence. You could say irregular verbs are verbs that “follow their own rules.” Regular verbs follow the standard grammar rules of modern English in adding “-ed” or “-d” to form the past tense and past participle forms.

To help you with this, below we list the common irregular verbs and their tense forms, along with a quick explanation of what they are and how they work. Grammarly helps you communicate confidently Write with Grammarly

Irregular present tense verbs english