English Verb - To Understand Infinitive - to understand Present participle - understanding Past participle - understood 1. Present Tense Singular I understand You understand He/she/it understands Plural We understand You understand They understand 2. Present Progressive Tense Singular I am understanding You are understanding He/she/it is understanding Plural We are understanding You are understanding They are understanding 3. Past Tense Singular I understood You understood He/she/it understood Plural We understood You understood They understood 4. Present Perfect Tense Singular I have understood You have understood He/she/it has understood Plural We have understood You have understood They have understood 5. Present Perfect Progressive Tense Singular I have been understanding You have been understanding He/she/it has been understanding Plural We have been understanding You have been understanding They have been understanding 6. Past Progressive Tense Singular I was understanding You were understanding He/she/it was understanding Plural We were understanding You were understanding They were understanding 7. Past Perfect Tense Singular I had understood You had understood He/she/it had understood Plural We had understood You had understood They had understood 8. Past Perfect Progressive Tense Singular I had been understanding You had been understanding He/she/it had been understanding Plural We had been understanding You had been understanding They had been understanding 9. Future Tense Singular I will understand You will understand He/she/it will understand Plural We will understand You will understand They will understand 10. Future Progressive Tense Singular will be understanding You will be understanding He/she/it will be understanding Plural We will be understanding You will be understanding They will be understanding 11. Future Perfect Tense Singular I will have understood You will have understood He/she/it will have understood Plural We will have understood You will have understood They will have understood 12. Future Perfect Progressive Tense Singular I will have been understanding You will have been understanding He/she/it will have been understanding Plural We will have been understanding You will have been understanding They will have been understanding