infinitive

present

understooe

indicative

present

(I)understooe
(you)understooe
(he,she,it)understooes
(we)understooe
(you)understooe
(they)understooe

past

(I)understooed
(you)understooed
(he,she,it)understooed
(we)understooed
(you)understooed
(they)understooed

participle

present

understooing

past

understooed