This is how dictionaries list past forms for irregular verbs: first the simple past tense, then the past participle, then the progressive participle.

Irregular verbs in the perfect tense in Spanish The perfect tense is made of the verb 'haber' and a past participle.

Amazingly, he found that this frequency affects the way that irregular verbs disappear according to a very simple and mathematical formula.

The 10-member K-pop group sees their Regular-Irregular album debut at No. 86 on the Billboard 200, marking NCT 127’s first appearance on America’s definitive albums chart.

NCT 127 made history this week as the second-highest charting K-pop boy band on the Billboard 200 album chart, where "Regular-Irregular" placed at No. 86. And it's all part of the group's plan to ...

Amazingly, he found that this frequency affects the way that irregular verbs disappear according to a very simple and mathematical formula. They regularise in a way that is 'inversely proportional to ...