What's the irregular form of clean?

[Cleany]

English Language Tests, Intermediate level

ESL/EFL Test #260 "Irregular Verbs Test (", question 1

Curt ......... down his pencil because he was so frustrated with the difficulty of the intensive exam.

(a) laid
(b) laying
(c) lying

English Language Tests, Intermediate level

ESL/EFL Test #260 "Irregular Verbs Test (", answer 1

Curt laid down his pencil because he was so frustrated with the difficulty of the intensive exam.

Correct answer: (a) laid
_________________________

Irregular Form of clean?

Cleany

[Mister Micawber]

.
None that I know of: clean/cleaned/cleaned; clean/cleaner/cleanest.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber