Verbs irregular only in spelling

Many verbs derive from Germanic strong verbs, which make many of their inflected forms through vowel gradation, as can be observed in Modern English patterns.

Although in the meaning "let out", of a rope etc., pay may have the regular spelling payed.

Verb		Past		Past Participle
lay		laid		laid
pay		paid		paid

To find the correct form, you can use an online database of the irregular verbs.

For example: irregular verb LAY