Past tense understandConjugation
or inflection of verbs is the collection of different forms of verbs. By changing their forms, often with suffixes and auxiliary words, they express the grammatical categories of verbs, such as person, number, tense, aspect, voice and mood. According to the conjugation form, verbs are divided into different verb classes, to which are assigned paradigms according to which the verbs of the class are conjugated.
|< throw ||Infinitive: understand|
Past simple: understood
Past participle: understood
| upset >|
More information for past tense understand can be found in the irregular verb database.